Ethereum

What It Is

Ethereum is an open, general-purpose blockchain that supports smart contracts, tokens, decentralized applications, and settlement of transactions. It uses proof-of-stake consensus and ETH as its native asset for transaction fees and validator participation. Ethereum is not a company or a single application; it is a protocol and ecosystem involving independent validators, developers, wallets, applications, infrastructure providers, and community organizations.

Key Features

• Layer 1 settlement and execution for smart contracts and decentralized applications.
• ETH is used for transaction fees and proof-of-stake validation.
• Broad standards and tooling for fungible tokens, NFTs, decentralized finance, identity, governance, and other applications.
• A large scaling ecosystem uses rollups and other Layer 2 networks that introduce separate technical and bridge assumptions.

Fees and Costs

Users pay gas in ETH for Layer 1 transactions. Fees vary with network demand, transaction complexity, and fee settings. Layer 2 systems may reduce transaction costs but add their own withdrawal, bridge, operator, proof, and smart-contract considerations.

Custody and Security

Ethereum's protocol is secured through proof-of-stake validators and open-source client software. This does not make every token, application, wallet, bridge, or smart contract safe. Users can lose assets through key compromise, malicious approvals, contract exploits, scams, incorrect networks, or irreversible transactions.

Availability and Eligibility

The protocol is globally accessible where internet and compatible software are available, but wallets, exchanges, applications, stablecoins, and service providers may impose geographic or legal restrictions.

Potential Advantages

• Large developer, tooling, wallet, and application ecosystem.
• Open standards and strong composability between applications.
• Mature Layer 1 with multiple client implementations and a broad Layer 2 ecosystem.

Limitations and Risks

• Layer 1 fees can rise during high demand.
• User experience across wallets, tokens, bridges, and Layer 2 networks can be complex.
• Smart-contract, bridge, oracle, stablecoin, governance, and application risks vary widely.
• Protocol access does not guarantee that a connected service is lawful or available in the user's location.

Who May Find It Useful

Useful for learning how programmable public blockchains, tokens, dApps, and Layer 2 systems operate. It is not a single investment product, and participation requires careful evaluation of each application and asset.

Maintenance note: Recheck material facts before publication and at least every six months, or sooner after a major product, legal, fee, security, network, or availability change.

Last reviewed: 2026-07-23. Information may change — verify directly with the provider.