Bitcoin is a decentralized cryptocurrency originally described in a 2008 whitepaper by a person, or group of people, using the alias Satoshi Nakamoto. It was launched soon after, in January 2009. Bitcoin is a peer-to-peer online currency, meaning that all transactions happen directly between equal, independent network participants, without the need for any intermediary to permit or facilitate them. Bitcoin was created, according to Nakamoto’s own words, to allow “online payments to be sent directly from one party to another without going through a financial institution.” Some concepts for a similar type of a decentralized electronic currency precede BTC, but Bitcoin holds the distinction of being the first-ever cryptocurrency to come into actual use.

Bitcoin’s original inventor is known under a pseudonym, Satoshi Nakamoto. As of 2021, the true identity of the person — or organization — that is behind the alias remains unknown. On October 31, 2008, Nakamoto published Bitcoin’s whitepaper, which described in detail how a peer-to-peer, online currency could be implemented. They proposed to use a decentralized ledger of transactions packaged in batches (called “blocks”) and secured by cryptographic algorithms — the whole system would later be dubbed “blockchain.” Just two months later, on January 3, 2009, Nakamoto mined the first block on the Bitcoin network, known as the genesis block, thus launching the world’s first cryptocurrency. Bitcoin price was $0 when first introduced, and most Bitcoins were obtained via mining, which only required moderately powerful devices (e.g. PCs) and mining software. The first known Bitcoin commercial transaction occurred on May 22, 2010, when programmer Laszlo Hanyecz traded 10,000 Bitcoins for two pizzas. At Bitcoin price today in mid-September 2021, those pizzas would be worth an astonishing $478 million. This event is now known as “Bitcoin Pizza Day.” In July 2010, Bitcoin first started trading, with the Bitcoin price ranging from $0.0008 to $0.08 at that time. However, while Nakamoto was the original inventor of Bitcoin, as well as the author of its very first implementation, he handed the network alert key and control of the code repository to Gavin Andresen, who later became lead developer at the Bitcoin Foundation. Over the years a large number of people have contributed to improving the cryptocurrency’s software by patching vulnerabilities and adding new features. Bitcoin’s source code repository on GitHub lists more than 750 contributors, with some of the key ones being Wladimir J. van der Laan, Marco Falke, Pieter Wuille, Gavin Andresen, Jonas Schnelli and others.

Bitcoin’s most unique advantage comes from the fact that it was the very first cryptocurrency to appear on the market. It has managed to create a global community and give birth to an entirely new industry of millions of enthusiasts who create, invest in, trade and use Bitcoin and other cryptocurrencies in their everyday lives. The emergence of the first cryptocurrency has created a conceptual and technological basis that subsequently inspired the development of thousands of competing projects. The entire cryptocurrency market — now worth more than $2 trillion — is based on the idea realized by Bitcoin: money that can be sent and received by anyone, anywhere in the world without reliance on trusted intermediaries, such as banks and financial services companies. Thanks to its pioneering nature, BTC remains at the top of this energetic market after over a decade of existence. Even after Bitcoin has lost its undisputed dominance, it remains the largest cryptocurrency, with a market capitalization that surpassed the $1 trillion mark in 2021, after Bitcoin price hit an all-time high of $64,863.10 on April 14, 2021. This is owing in large part to growing institutional interest in Bitcoin, and the ubiquitousness of platforms that provide use-cases for BTC: wallets, exchanges, payment services, online games and more.

Bitcoin’s total supply is limited by its software and will never exceed 21,000,000 coins. New coins are created during the process known as “mining”: as transactions are relayed across the network, they get picked up by miners and packaged into blocks, which are in turn protected by complex cryptographic calculations. As compensation for spending their computational resources, the miners receive rewards for every block that they successfully add to the blockchain. At the moment of Bitcoin’s launch, the reward was 50 bitcoins per block: this number gets halved with every 210,000 new blocks mined — which takes the network roughly four years. As of 2020, the block reward has been halved three times and comprises 6.25 bitcoins. Bitcoin has not been premined, meaning that no coins have been mined and/or distributed between the founders before it became available to the public. However, during the first few years of BTC’s existence, the competition between miners was relatively low, allowing the earliest network participants to accumulate significant amounts of coins via regular mining: Satoshi Nakamoto alone is believed to own over a million Bitcoin. Mining Bitcoins can be very profitable for miners, depending on the current hash rate and the price of Bitcoin. While the process of mining Bitcoins is complex, we discuss how long it takes to mine one Bitcoin on CoinMarketCap Alexandria — as we wrote above, mining Bitcoin is best understood as how long it takes to mine one block, as opposed to one Bitcoin. As of mid-September 2021, the Bitcoin mining reward is capped to 6.25 BTC after the 2020 halving, which is roughly $299,200 in Bitcoin price today.

Bitcoin is secured with the SHA-256 algorithm, which belongs to the SHA-2 family of hashing algorithms, which is also used by its fork Bitcoin Cash (BCH), as well as several other cryptocurren

Bitcoin is the first decentralized, peer-to-peer digital currency. One of its most important functions is that it is used as a decentralized store of value. In other words, it provides for ownership rights as a physical asset or as a unit of account. However, the latter store-of-value function has been debated. Many crypto enthusiasts and economists believe that high-scale adoption of the top currency will lead us to a new modern financial world where transaction amounts will be denominated in smaller units. The smallest units of Bitcoin, 0.00000001 BTC, are called Satoshis (or Sats in short), in a nod to the pseudonymous creator. At Bitcoin price now, 1 Satoshi is equivalent to roughly $0.00048. The top crypto is considered a store of value, like gold, for many — rather than a currency. This idea of the first cryptocurrency as a store of value, instead of a payment method, means that many people buy the crypto and hold onto it long-term (or HODL) rather than spending it on items like you would typically spend a dollar — treating it as digital gold.

A hard fork is a radical change to the protocol that makes previously invalid blocks/transactions valid, and therefore requires all users to upgrade. For example, if users A and B are disagreeing on whether an incoming transaction is valid, a hard fork could make the transaction valid to users A and B, but not to user C. A hard fork is a protocol upgrade that is not backward compatible. This means every node (computer connected to the Bitcoin network using a client that performs the task of validating and relaying transactions) needs to upgrade before the new blockchain with the hard fork activates and rejects any blocks or transactions from the old blockchain. The old blockchain will continue to exist and will continue to accept transactions, although it may be incompatible with other newer Bitcoin clients. A soft fork is a change to the Bitcoin protocol wherein only previously valid blocks/transactions are made invalid. Since old nodes will recognise the new blocks as valid, a soft fork is backward-compatible. This kind of fork requires only a majority of the miners upgrading to enforce the new rules. Some examples of prominent cryptocurrencies that have undergone hard forks are the following: Bitcoin’s hard fork that resulted in Bitcoin Cash, Ethereum’s hard fork that resulted in Ethereum Classic. Bitcoin Cash has been hard forked since its original forking, with the creation of Bitcoin SV. Read more about the difference between Bitcoin, Bitcoin Cash and Bitcoin SV here.

Taproot is a soft fork that bundles together BIP 340, 341 and 342 and aims to improve the scalability, efficiency, and privacy of the blockchain by introducing several new features. The two major changes are the introduction of the Merkelized Abstract Syntax Tree (MAST) and Schnorr Signature. MAST introduces a condition allowing the sender and recipient of a transaction to sign off on its settlement together. Schnorr Signature allows users to aggregate several signatures into one for a single transaction. This results in multi-signature transactions looking the same as regular transactions or more complex ones. By introducing this new address type, users can also save on transaction fees, as even complex transactions look like simple, single-signature ones. Although HODLers will probably not notice a big impact, Taproot could become a key milestone to equipping the network with smart contract functionality. In particular, Schnorr Signatures would lay the foundation for more complex applications to be built on top of the existing blockchain, as users start switching to Taproot addresses primarily. If adopted by users, Taproot could, in the long run, result in the network developing its own DeFi ecosystem that rivals those on alternative blockchains like Ethereum.

The Lightning Network is an off-chain, layered payment protocol that operates bidirectional payment channels which allows instantaneous transfer with instant reconciliation. It enables private, high volume and trustless transactions between any two parties. The Lightning Network scales transaction capacity without incurring the costs associated with transactions and interventions on the underlying blockchain.

A few years ago, the idea that a publicly traded company might hold Bitcoin on its balance sheets seemed highly laughable. The flagship cryptocurrency was considered to be too volatile to be adopted by any serious business. Many top investors, including Warren Buffett, labeled the asset a “bubble waiting to pop.” This negative sentiment appears to have been broken, with a number of corporate behemoths buying up Bitcoin since 2020. In particular, business intelligence firm MicroStrategy set the pace after it bought $425 million worth of Bitcoin in August and September 2020. Since then, many others have followed suit, including EV manufacturer Tesla. MicroStrategy has by far the largest Bitcoin portfolio held by any publicly-traded company. The business analytics platform has adopted Bitcoin as its primary reserve asset, aggressively buying the cryptocurrency through 2021 and 2022. As of August 30, 2022, the company had 129,699 Bitcoin in its reserve, equivalent to just over $2.5 billion. Other top corporate holders include Marathon Digital Holdings, with 10,054 BTC, Coinbase (9,000), Square Inc. (8,027), and Hut 8 Mining Corp. (7,078).

Bitcoin is becoming more political by the day, particularly after El Salvador began accepting the currency as legal tender. The country's president, Nayib Bukele, announced and implemented the decision almost unilaterally, dismissing criticism from his citizens, the Bank of England, the IMF, Vitalik Buterin and many others. Since the Bitcoin legal tender law was passed in September 2021, Bukele has also announced plans to build Bitcoin City, a city fully based on mining Bitcoin with geothermal energy from volcanoes. Countries like Mexico, Russia and others have been rumored to be candidates also to accept Bitcoin as legal tender, but thus far, El Salvador stands alone. On the flip side, countries like China have moved to heavily clamp down on Bitcoin mining and trading activities. In May 2021, the Chinese government declared that all crypto-related transactions are illegal. This was followed by a heavy crackdown on Bitcoin mining operations, forcing many crypto-related businesses to flee to friendlier regions. Surprisingly, the anti-crypto stance of the Chinese government has done little to stop the industry. According to data by the University of Cambridge, China is now the second-biggest contributor to Bitcoin's global hash rate, only behind the United States.

The current valuation of Bitcoin is constantly moving, all day every day. It is a truly global asset. From a start of under one cent per coin, BTC has risen in price by thousands of percent to the numbers you see above. The prices of all cryptocurrencies are quite volatile, meaning that anyone’s understanding of how much Bitcoin is will change by the minute. However, there are times when different countries and exchanges show different prices and understanding how much Bitcoin is will be a function of a person’s location.

Bitcoin is, in many regards, almost synonymous with cryptocurrency, which means that you can buy Bitcoin on virtually every crypto exchange — both for fiat money and other cryptocurrencies. Some of the main markets where BTC trading is available are: Binance Coinbase Pro OKEx Kraken Huobi Global Bitfinex If you are new to crypto, use CoinMarketCap’s own educational portal — Alexandria — to learn how to start buying Bitcoin and other cryptocurrencies.

Over the past few decades, consumers have become more curious about their energy consumption and personal effects on climate change. When news stories started swirling regarding the possible negative effects of Bitcoin’s energy consumption, many became concerned about Bitcoin and criticized this energy usage. A report found that each Bitcoin transaction takes 1,173 KW hours of electricity, which can “power the typical American home for six weeks.” Another report calculates that the energy required by Bitcoin annually is more than the annual hourly energy usage of Finland, a country with a population of 5.5 million. The news has produced commentary from tech entrepreneurs to environmental activists to political leaders alike. In May 2021, Tesla CEO Elon Musk even stated that Tesla would no longer accept the cryptocurrency as payment, due to his concern regarding its environmental footprint. Though many of these individuals have condemned this issue and move on, some have prompted solutions: how do we make Bitcoin more energy efficient? Others have simply taken the defensive position, stating that the Bitcoin energy problem may be exaggerated. At present, miners are heavily reliant on renewable energy sources, with estimates suggesting that Bitcoin’s use of renewable energy may span anywhere from 40-75%. However, to this point, critics claim that increasing Bitcoin’s renewable energy usage will take away from solar sources powering other sectors and industries like hospitals, factories or homes. The Bitcoin mining community also attests that the expansion of mining can help lead to the construction of new solar and wind farms in the future. Furthermore, some who defend Bitcoin argue that the gold and banking sector — individually — consume twice the amount of energy as Bitcoin, making the criticism of Bitcoin’s energy consumption a nonstarter. Moreover, the energy consumption of Bitcoin can easily be tracked and traced, which the same cannot be said of the other two sectors. Those who defend Bitcoin also note that the complex validation process creates a more secure transaction system, which justifies the energy usage. Another point that Bitcoin proponents make is that the energy usage required by Bitcoin is all-inclusive such that it encompasess the process of creating, securing, using and transporting Bitcoin. Whereas with other financial sectors, this is not the case. For example, when calculating the carbon footprint of a payment processing system like Visa, they fail to calculate the energy required to print money or power ATMs, or smartphones, bank branches, security vehicles, among other components in the payment processing and banking supply chain. What exactly are governments and nonprofits doing to reduce Bitcoin energy consumption? Earlier this year in the U.S., a congressional hearing was held on the topic where politicians and tech figures discussed the future of crypto mining in the U.S, specifically highlighting their concerns regarding fossil fuel consumption. Leaders also discussed the current debate surrounding the coal-to-crypto trend, particularly regarding the number of coal plants in New York and Pennsylvania that are in the process of being repurposed into mining farms. Aside from congressional hearings, there are private sector crypto initiatives dedicated to solving environmental issues such as the Crypto Climate Accord and Bitcoin Mining Council. In fact, the Crypto Climate Accord proposes a plan to eliminate all greenhouse gas emissions by 2040, And, due to the innovative potential of Bitcoin, it is reasonable to believe that such grand plans may be achieved.

The most popular wallets for cryptocurrency include both hot and cold wallets. Cryptocurrency wallets vary from hot wallets and cold wallets. Hot wallets are able to be connected to the web, while cold wallets are used for keeping large amounts of coins outside of the internet. Some of the top crypto cold wallets are Trezor, Ledger and CoolBitX. Some of the top crypto hot wallets include Exodus, Electrum and Mycelium. Still not sure of which wallet to use? Check out CoinMarketCap Alexandria’s guide on the top cold wallets of 2021 and top hot wallets of 2021.

Ethereum is a decentralized open-source blockchain system that features its own cryptocurrency, Ether. ETH works as a platform for numerous other cryptocurrencies, as well as for the execution of decentralized smart contracts. Ethereum was first described in a 2013 whitepaper by Vitalik Buterin. Buterin, along with other co-founders, secured funding for the project in an online public crowd sale in the summer of 2014. The project team managed to raise $18.3 million in Bitcoin, and Ethereum’s price in the Initial Coin Offering (ICO) was $0.311, with over 60 million Ether sold. Taking Ethereum’s price now, this puts the return on investment (ROI) at an annualized rate of over 270%, essentially almost quadrupling your investment every year since the summer of 2014. The Ethereum Foundation officially launched the blockchain on July 30, 2015, under the prototype codenamed “Frontier.” Since then, there has been several network updates — “Constantinople” on Feb. 28, 2019, “Istanbul” on Dec. 8, 2019, “Muir Glacier” on Jan. 2, 2020, “Berlin” on April 14, 2021, and most recently on Aug. 5, 2021, the “London” hard fork. Ethereum’s own purported goal is to become a global platform for decentralized applications, allowing users from all over the world to write and run software that is resistant to censorship, downtime and fraud.

Ethereum has a total of eight co-founders — an unusually large number for a crypto project. They first met on June 7, 2014, in Zug, Switzerland. Russian-Canadian Vitalik Buterin is perhaps the best known of the bunch. He authored the original white paper that first described Ethereum in 2013 and still works on improving the platform to this day. Prior to ETH, Buterin co-founded and wrote for the Bitcoin Magazine news website. British programmer Gavin Wood is arguably the second most important co-founder of ETH, as he coded the first technical implementation of Ethereum in the C++ programming language, proposed Ethereum’s native programming language Solidity and was the first chief technology officer of the Ethereum Foundation. Before Ethereum, Wood was a research scientist at Microsoft. Afterward, he moved on to establish the Web3 Foundation. Among the other co-founders of Ethereum are: - Anthony Di Iorio, who underwrote the project during its early stage of development. - Charles Hoskinson, who played the principal role in establishing the Swiss-based Ethereum Foundation and its legal framework. - Mihai Alisie, who provided assistance in establishing the Ethereum Foundation. - Joseph Lubin, a Canadian entrepreneur, who, like Di Iorio, has helped fund Ethereum during its early days, and later founded an incubator for startups based on ETH called ConsenSys. - Amir Chetrit, who helped co-found Ethereum but stepped away from it early into the development.

Ethereum has pioneered the concept of a blockchain smart contract platform. Smart contracts are computer programs that automatically execute the actions necessary to fulfill an agreement between several parties on the internet. They were designed to reduce the need for trusted intermediates between contractors, thus reducing transaction costs while also increasing transaction reliability. Ethereum’s principal innovation was designing a platform that allowed it to execute smart contracts using the blockchain, which further reinforces the already existing benefits of smart contract technology. Ethereum’s blockchain was designed, according to co-founder Gavin Wood, as a sort of “one computer for the entire planet,” theoretically able to make any program more robust, censorship-resistant and less prone to fraud by running it on a globally distributed network of public nodes. In addition to smart contracts, Ethereum’s blockchain is able to host other cryptocurrencies, called “tokens,” through the use of its ERC-20 compatibility standard. In fact, this has been the most common use for the ETH platform so far: to date, more than 280,000 ERC-20-compliant tokens have been launched. Over 40 of these make the top-100 cryptocurrencies by market capitalization, for example, USDT, LINK and BNB. Since the emergence of Play2Earn games, there has been a substantial increase in interest in the ETH to PHP price.

Ethereum Name Service, aka ENS, is a distributed and extensible naming system based on the Ethereum blockchain. It is essentially the Web3 version of DNS, short for domain name service. In its original state, a cryptocurrency address consists of a long string of numbers and letters designed to be read by computers. It may look like this — “0xDC25EF3F5B8A186998338A2ADA83795FBA2D695E” — making it confusing at times to read, and in some cases even leading to loss of funds. ENS provides a solution to this problem of long and confusing crypto addresses by assigning human-readable names to machine-readable identifiers such as Ethereum addresses, metadata, other cryptocurrency addresses and content hashes. With ENS, the long address above could become something as simple as “Alice.eth,” and you can receive any type of cryptocurrency or NFT via your ENS domain. ENS is based on two Ethereum smart contracts. The first is the ENS registry, which records three critical pieces of information: the owner of the domain, the resolver for the domain and the caching time for all records under the domain. The second smart contract is the Resolver, which translates the domain name to a machine-readable address and vice-versa. It is worth adding that in addition to integrating with .eth names, ENS also supports the most popular DNS names, including .com, .org, .io, .app and several others.

Since its inception, Ethereum has maintained its spot as the second-largest cryptocurrency by market capitalization. But like every other blockchain network that exists, Ethereum is not perfect. Notable, the legacy blockchain is plagued with high gas fees and low throughput of between 15 to 30 transactions per second. Although plans are already on the way to solve these shortcomings through several upgrades, many competitors have capitalized on this delay to offer crypto users cheaper and faster transactions. The term “Ethereum Killer” emerged around 2016/2017 as substitute blockchains such as Cardano began to enter the crypto scene. In 2018, EOS made its debut as the next “Ethereum killer,” raising $4.1 billion from investors, the highest amount an ICO had ever generated. Since then, others like Tezos, Solana, Fantom, Avalanche and Binance Smart Chain have surfaced as possible Ethereum killers. Each of these blockchains employs a different consensus model to tackle Ethereum’s PoW-induced limitations. For instance, Solana uses proof-of-history (PoH) while Binance Smart Chain utilizes both proof-of-authority (PoA) and delegated proof-of-stake (DPoS). However, none of these alternative blockchains have been able to unseat Ethereum as the second-largest cryptocurrency by market cap. Ethereum is also currently the largest blockchain for NFT trading activities.

The EIP-1559 upgrade introduces a mechanism that changes the way gas fees are estimated on the Ethereum blockchain. Before the upgrade, users had to participate in an open auction for their transactions to be picked up by a miner. This process is known as a “first-price auction,” and as expected, the highest bidder wins. With EIP-1559, this process is handled by an automated bidding system, and there is a set “base fee” for transactions to be included in the next block. This fee varies based on how congested the network is. Furthermore, users who wish to speed up their transactions can pay a “priority fee” to a miner for faster inclusion. EIP-1559 also introduces a fee-burning mechanism. A part of every transaction fee (the base fee) is burned and removed out of circulation. This is intended to lower the circulating supply of Ether and potentially increase the value of the token over time. Interestingly, less than two months after the London upgrade was implemented, the network had burned over $1 billion worth of Ether.

In September 2021, there were around 117.5 million ETH coins in circulation, 72 million of which were issued in the genesis block — the first ever block on the Ethereum blockchain. Of these 72 million, 60 million were allocated to the initial contributors to the 2014 crowd sale that funded the project, and 12 million were given to the development fund. The remaining amount has been issued in the form of block rewards to the miners on the Ethereum network. The original reward in 2015 was 5 ETH per block, which later went down to 3 ETH in late 2017 and then to 2 ETH in early 2019. The average time it takes to mine an Ethereum block is around 13-15 seconds. In the August 2021 Ethereum network upgrade, the London hard fork contained the Ethereum Improvement Protocol, EIP-1559. Instead of the first-price auction mechanism where the highest bidder wins, EIP-1559 introduces a “base fee” for transactions to be included in the next block. Users that want to have their transaction prioritized can pay a “tip” or “priority fee” to miners. As the base fee adjusts dynamically with transaction activity, this reduces the volatility of Ethereum gas fees, although it does not reduce the price, which is notoriously high during peak congestion on the network. One of the major differences between Bitcoin and Ethereum’s economics is that the latter is not deflationary, i.e. its total supply is not limited. Ethereum’s developers justify this by not wanting to have a “fixed security budget” for the network. Being able to adjust ETH’s issuance rate via consensus allows the network to maintain the minimum issuance needed for adequate security. With the introduction of EIP-1559 however, the base fees used in transactions are burned, removing the ETH from circulation. This means higher activity on the network would lead to more ETH burned, and the decreasing supply should lead to appreciation of Ethereum price, all things equal. This has the potential to make Ethereum deflationary, something ETH holders are excited about — a potential appreciation in Ethereum price today.

As of August 2020, Ethereum is secured via the Ethash proof-of-work algorithm, belonging to the Keccak family of hash functions. There are plans, however, to transition the network to a proof-of-stake algorithm tied to the major Ethereum 2.0 update, which launched in late 2020. After the Ethereum 2.0 Beacon Chain (Phase 0) went live in the beginning of December 2020, it became possible to begin staking on the Ethereum 2.0 network. An Ethereum stake is when you deposit ETH (32 ETH is required to activate validator software) on Ethereum 2.0 by sending it to a deposit contract, thus helping to secure the network by storing data, processing transactions and adding new blocks to the blockchain. At the time of writing in mid-September 2021, the Ethereum price now for 32 Ether is roughly $116,029. The amount of money earned by Ethereum validators right now is a return of 6% APR, which equates to around 1.91952 ETH, or $6960 in Ethereum price today. This number will change as the network develops and the amount of stakers (validators) increase. Ethereum staking rewards are determined by a distribution curve (the participation and average percent of stakers): some ETH 2.0 staking rewards were at 20% for early stakers, but will be lowered to end up between 7% and 4.5% annually. The minimum requirements for an Ethereum stake are 32 ETH. If you decide to stake in Ethereum 2.0, it means that your Ethererum stake will be locked up on the network for months, if not years, in the future until the Ethereum 2.0 upgrade is completed.

Given the fact that Ethereum is the second-largest cryptocurrency after Bitcoin, it is possible to buy Ethereum, or use ETH trading pairs on nearly all of the major crypto exchanges. Some of the largest markets include: Binance Coinbase Pro OKEx Kraken Huobi Global Popular Ethereum price pairs include: ETH/USD, ETH/GBP, ETH/AUD and ETH/JPY.

The Ethereum network has been plagued with high transaction fees, often spiking at seasons of high demand. In May 2021, the average transaction fee of the network peaked at $71.72. In addition to the high cost of transactions, the leading altcoin also suffers from scalability issues. As already mentioned, there are plans to transition to a proof-of-stake algorithm in order to boost the platform’s scalability and add a number of new features. The development team has already begun the transition process to ETH 2.0, implementing some upgrades along the way, including the London hard fork. The London upgrade went live in August 2021. It included five Ethereum Improvement Proposals (EIPs), namely EIP-3529, EIP-3198, EIP-3541, and most notably EIP-1559 and EIP-3554. EIP-1559 is arguably the most popular upgrade out of all the EIPs.

In 2022, Ethereum plans to switch to proof-of-stake with its Ethereum 2.0 update. This switch has been in the Ethereum roadmap since the network's inception and would see a new consensus mechanism, as well as introduce sharding as a scaling solution. The current Ethereum chain will become the Beacon Chain and serve as a settlement layer for smart contract interactions on other chains. In late 2021, Ethereum's Arrow Glacier update was delayed to June 2022. Until then, Vitalik Buterin expects the road to the network's endgame to be shaped by optimistic rollups and Zk-rollups. In January 2022, the Ethereum Foundation announced the decision to remove the “Ethereum 2.0” terminology to “save all future users from navigating this confusing mental model.” It went on to explain that the previously-referred-to terms of “Ethereum 1.0” would be branded the “execution layer,” while “Ethereum 2.0” will be called the “consensus layer”. This is ultimately to provide a more accurate version of the Ethereum roadmap. In an update on the progress of the Merge, on April 13, 2022, Ethereum developer Tim Beiko tweeted an update on the progress of the Merge, stating that they are “definitely in the final chapter of PoW on Ethereum.” He also mentioned that users can expect it to occur a few months after June, although no exact date was provided. This came on the back of the first mainnet shadow fork — to test the transition to PoS on Ethereum — that was successfully implemented on April 11, 2022.

In 2022, Ethereum renamed its transition from proof-of-work to proof-of-stake from Ethereum 2.0 to The Merge. The Merge went live on Sept. 15, 2022, after the merge of the Goerli testnet successfully completed on Aug. 11, 2022. Read: All you ever wanted to learn about the Ethereum Merge. The Merge implements several critical changes to Ethereum. First, it merges the existing PoW Ethereum mainnet with the Beacon Chain, a PoS chain. Together, the two chains will form the new proof-of-stake Ethereum, which will consist of a consensus layer and an execution layer. The consensus layer will synchronize the chain state across the network, while the execution layer handles transactions and block production. Second, the Merge significantly reduces ETH issuance. This has been dubbed the "triple halving" in a nod to the Bitcoin halving, since the Merge reduces ETH issuance by 90%. With more than 14M ETH already staked, ETH could very well become deflationary after the transition. Furthermore, stakers are expected to earn between 8% and 12% APR at current projections. Staked ETH will not be withdrawable immediately after the Merge — it will only be enabled after the Shanghai upgrade, estimated to be 6 to 12 months later. Learn more about the common misconceptions of Ethereum post-Merge. The Merge will not increase transaction throughput or reduce gas fees, as the block production rate stays roughly the same at 12 seconds (currently 13 seconds). It will also not enable on-chain governance, with protocol changes still discussed and decided off-chain through stakeholders. Importantly, the transition to PoS is expected to reduce Ethereum's annual energy consumption from 112 TWh/yr to only 0.01 TWh/yr — a 99.9% drop. This reduction prompted investors to expect an influx of institutional money in a "greener" Ethereum. On the flip side, Ethereum miners, in an industry estimated to be worth $19 billion, seek to champion ETHPoW, a potential hard fork of Ethereum on proof-of-work. We explain the main differences in our ETH PoS vs ETH PoW article.

The biggest Ethereum upgrade since The Merge, the Shanghai Upgrade will allow ETH stakers to unstake their ETH and withdraw ETH rewards from the Beacon Chain. During The Merge, the Ethereum proof-of-work chain merged with the proof-of-stake Beacon Chain. Instead of mining, validators stake 32 ETH to secure the network. However, stakers are unable to unstake and withdraw until the Shanghai Upgrade. The Shanghai/Capella (“Shapella”) Upgrade is a hard fork that will implement five EIPs — the most anticipated being EIP-4895, which will enable withdrawals. Shanghai is the hard fork’s name on the execution layer, while Capella is the name on the consensus layer. On Feb. 7, 2023, withdrawals on the Zhejiang testnet were enabled, and on Feb. 28, the Sepolia testnet successfully executed the hard fork upgrade. On March 15, 2023, the hard fork was executed on the Goerli testnet, the last test run before the mainnet upgrade, expected to happen sometime in March 2023. Over 17.5 million ETH will become available for withdrawals.

Avalanche is a layer one blockchain that functions as a platform for decentralized applications and custom blockchain networks. It is one of Ethereum’s rivals, aiming to unseat Ethereum as the most popular blockchain for smart contracts. It aims to do so by having a higher transaction output of up to 6,500 transactions per second while not compromising scalability. This is made possible by Avalanche’s unique architecture. The Avalanche network consists of three individual blockchains: the X-Chain, C-Chain and P-Chain. Each chain has a distinct purpose, which is radically different from the approach Bitcoin and Ethereum use, namely having all nodes validate all transactions. Avalanche blockchains even use different consensus mechanisms based on their use cases. After its mainnet launch in 2020, Avalanche has worked on developing its own ecosystem of DApps and DeFi. Different Ethereum-based projects such as SushiSwap and TrueUSD have integrated with Avalanche. Furthermore, the platform is constantly working on improving interoperability between its own ecosystem and Ethereum, like through the development of bridges. ------------------------------------------------------------------------------------------ Who Are the Founders of Avalanche? Avalanche was launched by Ava Labs, founded by Cornell University professor Emin Gün Sirer, and Cornell University computer science PhD’s Kevin Sekniqi and Maofan “Ted” Yin. Gün Sirer is a veteran in cryptographic research, having designed a conceptual peer-to-peer virtual currency six years before the release of the Bitcoin whitepaper. He was also involved in work on Bitcoin scaling solutions and research on Ethereum before the infamous The DAO hack in 2016. From that research arose the whitepaper that led to the foundation of Ava Labs in 2018. The project closed a seed round in February 2019 that included investors such as Polychain, Andreessen Horowitz and Balaji Srinivasan. Avalanche closed its initial coin offering in 2020 in under 24 hours, raising $42 million in the process.

Avalanche attempts to solve the blockchain trilemma, which posits that blockchains cannot achieve a sufficient degree of decentralization at scale. A consequence of this are high gas fees, as is often the case on Ethereum. To solve this problem, Avalanche designed three interoperable blockchains. The Exchange Chain (X-Chain) is employed to create and exchange the native AVAX tokens and other assets. Similar to the ERC-20 standard on Ethereum, these tokens follow a set of standardized rules. It uses the Avalanche consensus mechanism. The Contract Chain (C-Chain) hosts smart contracts and decentralized applications. It has its own Avalanche Virtual Machine, similar to the Ethereum Virtual Machine, allowing developers to fork EVM-compatible DApps. It uses the Snowman consensus mechanism. The Platform Chain (P-Chain) coordinates network validators, tracks active subnets and enables the creation of new subnets. Subnets are sets of validators, sort of like a validator cartel. Each subnet can be validating several blockchains, but a blockchain can only be validated by one subnet. It also uses the Snowman consensus mechanism. This division of computing tasks enables higher throughput without compromising on decentralization. For instance, private blockchains on the network could require its subnet’s validators to be sufficiently geographically decentralized or comply with certain regulations. Following this modular structure, Avalanche improves its interoperability with other blockchains wishing to integrate with the Avalanche ecosystem. Furthermore, the two different consensus mechanisms are designed with each blockchain’s requirements in mind, further improving their efficiency.