Ethereum (ETH)

Overview

Ethereum is a public blockchain that lets people send digital assets and run programs called smart contracts. Its native cryptocurrency is ether, or ETH. Ethereum is the network; ETH is the asset used to pay for activity on it. Developers use the network to build applications for payments, finance, games, digital collectibles, and other services. Anyone with an internet connection can use these applications without needing permission from a single company that runs Ethereum. (ethereum.org)

A useful way to picture Ethereum is as a shared computer. Many independent computers keep copies of its records and check that its rules are followed. A smart contract is a program placed on that shared system. Once deployed, it can receive transactions and carry out actions according to its code. This makes Ethereum useful for more than sending ETH: it also provides a common foundation for other tokens and applications. (ethereum.org)

History & Team

From an idea to a public network

Vitalik Buterin described Ethereum in a white paper shared in 2013. His goal was a blockchain on which developers could create many kinds of applications. A public sale of ETH in 2014 helped fund development, and the network launched on July 30, 2015. Early contributors included Gavin Wood, who wrote a technical description of Ethereum; Jeffrey Wilcke, who worked on its software; and Joseph Lubin, who helped support the project’s early growth. Other co-founders included Mihai Alisie, Anthony Di Iorio, Amir Chetrit, and Charles Hoskinson. (ethereum.org)

Ethereum’s development now extends well beyond its founding team. The nonprofit Ethereum Foundation supports research and work across the ecosystem, while independent developers build the software that runs the network. Proposed changes are discussed through Ethereum Improvement Proposals, or EIPs. Developers, node operators, validators, application builders, and users can all take part in those discussions. Decisions about Ethereum’s core protocol happen through this open, off-chain process rather than a vote in which each ETH automatically gives its holder control over the network. (ethereum.org)

A major change came on September 15, 2022, when an upgrade known as The Merge moved Ethereum from proof-of-work mining to proof-of-stake validation. Later upgrades added staking withdrawals, expanded the data capacity available to scaling networks, and improved features for wallets and validators. (ethereum.org)

Technology & How It Works

Smart contracts and the EVM

Ethereum records transactions in blocks that computers called nodes can check. A transaction might transfer ETH, send another token, or call a smart contract. Smart contracts run in the Ethereum Virtual Machine, or EVM. Because the EVM follows shared rules, computers across the network can reach the same result when they process a contract. That shared execution is what allows an application to operate without one company maintaining the only copy of its records. (ethereum.org)

Every transaction uses computing resources measured in gas. The amount of gas depends on the work being done: a simple ETH transfer uses less than many smart-contract interactions. Users pay gas fees in ETH. Each fee includes a network-set base fee, which is removed from circulation, and a priority fee, which goes to the validator that includes the transaction. The base fee changes with demand for block space. (ethereum.org)

Proof of stake and layer 2

Under proof of stake, validators lock ETH and help check and add blocks. Running a validator directly requires at least 32 ETH and the equipment to operate a node. Pooled services combine deposits from participants who want to take part with smaller amounts, though those services operate outside the protocol’s direct solo-staking process. Validators can receive ETH rewards for carrying out their duties. (ethereum.org)

Ethereum also uses layer-2 networks to handle more activity. These networks process transactions separately, then send information back to Ethereum. Rollups are one form of layer 2. Upgrades have made it easier for rollups to publish transaction data in units called blobs, helping them share Ethereum’s capacity more efficiently. Examples of Ethereum layer-2 networks include Arbitrum, Optimism, Base, and ZKsync. (ethereum.org)

Tokenomics & Utility

ETH has three central roles. It pays for transactions, provides the stake used by validators, and can be transferred between people or used within applications. A person using a decentralized exchange, for example, may hold tokens issued by an application but still need ETH to pay for a transaction on Ethereum’s main network. These linked roles connect demand for the network’s services with use of its native asset. (ethereum.org)

Ethereum began with ETH distributed through its early sale and project allocations. Since launch, the protocol has also issued new ETH to participants who secure the network. Today, proof-of-stake rewards create new ETH, while the base portion of transaction fees is burned. The balance between issuance and burning determines whether the total supply rises or falls over a given period. Ethereum has no fixed maximum supply set by its protocol. Its economic model therefore depends on network rules and activity rather than a permanent supply cap. (ethereum.org)

ETH also differs from tokens created on Ethereum. A developer can issue a token through a smart contract, but that token has its own rules and purpose. ETH is built into the Ethereum protocol itself. Staking ETH helps validators participate in consensus; holding an application’s token does not serve that same protocol role. (ethereum.org)

Ecosystem & Use Cases

Applications and digital assets

Ethereum supports a wide range of applications. In decentralized finance, or DeFi, smart contracts can enable token swaps, lending, borrowing, and other financial activity. Stablecoins use blockchain tokens to represent value linked to an asset such as a currency. People can also send ETH directly to one another. These uses depend on software built by different teams, all interacting with the same underlying network. (ethereum.org)

Shared token standards make those interactions easier. ERC-20 is a common standard for interchangeable tokens, such as many application tokens and stablecoins. ERC-721 provides a standard for unique tokens, often called non-fungible tokens or NFTs. An NFT can identify a particular digital collectible, game item, or access right. Standards give wallets and applications familiar ways to recognize and handle assets created by different developers. (ethereum.org)

Other projects use Ethereum to organize online communities. A decentralized autonomous organization, or DAO, can use smart contracts to manage shared funds or carry out decisions under its own rules. Developers also build tools for identity, games, and records of digital ownership. Layer-2 networks extend this ecosystem by offering places to use Ethereum-based applications while reducing the amount of activity that must be processed directly on the main network. (ethereum.org)

Advantages & Challenges

Ethereum’s main strength is its flexibility. Developers can build new services using smart contracts and common token standards instead of creating a new blockchain for each idea. Its long-running public network, established development tools, and broad range of applications make it easier for projects to work with one another. Proof of stake also uses far less energy than Ethereum’s former mining system. (ethereum.org)

That flexibility brings challenges. When many people want space in Ethereum blocks, main-network gas fees can rise. Layer-2 networks add capacity, but users and developers must understand which network holds their assets and how to move between networks. Smart contracts, wallets, and staking services can also make the experience more complex than a simple payment app. Continuing to increase capacity while keeping the network practical for independent participants is a central part of Ethereum’s development work. (ethereum.org)

Where to Buy & Wallets

ETH is available on Coinbase, Kraken, and Gemini. These platforms offer ways to purchase ether through an account, with payment and identity-verification steps that depend on the platform and location. After a purchase, ETH can remain with the platform or be transferred to a wallet controlled by its owner. A transfer uses an Ethereum address, and the sending and receiving sides need to use the intended network. (coinbase.com)

MetaMask is an example of a browser and mobile wallet that supports Ethereum. Hardware wallets are another option for holding the keys that control ETH. A wallet gives its user a way to view balances, send assets, and connect to applications. An exchange account and a self-custody wallet serve different roles: with a self-custody wallet, the user controls the keys used to authorize transactions. (ethereum.org)

Regulatory & Compliance

Rules for ETH-related services depend on the jurisdiction and on the activity involved. In the United States, a March 2026 interpretation from the Securities and Exchange Commission, with guidance from the Commodity Futures Trading Commission, names ether as a digital commodity under its crypto-asset categories. U.S. regulators have also approved exchange-traded products that hold ether. Separate rules can apply to an exchange, a fund, or a service built using Ethereum. (sec.gov)

In the European Union, the Markets in Crypto-Assets framework, known as MiCA, sets requirements for providers of crypto-asset services, including authorization rules. In the United Kingdom, cryptoasset businesses are subject to rules covering matters such as registration and promotions to consumers. These frameworks govern businesses and services around cryptoassets as well as the way they are offered. (esma.europa.eu)

From an Islamic finance perspective, Amanie Advisors’ Shariah Supervisory Board endorsed a study that considers ether a Shariah-compliant asset that Muslims may buy, sell, and hold for participation in Ethereum. The study also assesses smart-contract activity by its purpose and terms: applications involving prohibited elements, such as interest-based arrangements or gambling, do not meet its Shariah requirements. This distinction connects the treatment of ETH itself with how a particular Ethereum application is used. (amanieadvisors.com)

Future Outlook

Ethereum’s roadmap focuses on increasing capacity, improving the experience of using wallets, and keeping the network open to independent participants. The Pectra upgrade in May 2025 added wallet-related features and expanded capacity for rollups. Fusaka, activated in December 2025, improved how the network handles the data posted by rollups. Ethereum’s next planned major upgrade, Glamsterdam, is in development, with proposals aimed at improving how blocks are built and processed. Its timing and final features depend on testing and the community’s upgrade process. (ethereum.org)

The broader direction is a network where Ethereum’s main chain provides a shared foundation and layer-2 systems handle much of the everyday activity. How well that approach works will depend on continued improvements to capacity, ease of use, and coordination among the many teams building on Ethereum. (ethereum.org)

Summary

Ethereum combines a public blockchain with programmable smart contracts. ETH pays for activity on the network and helps secure it through staking. Since its 2015 launch, Ethereum has grown into a foundation for tokens, financial applications, digital collectibles, and layer-2 networks. Its ongoing work centers on making that shared platform easier to use and able to support more activity. (ethereum.org)