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What is Ethereum (ETH)?
Quick Facts
- Symbol: ETH
- Type: Layer-1 smart contract blockchain
- Consensus: Proof-of-Stake (since 2022)
- Founded: Proposed in 2013, mainnet launched in 2015
- Creator: Vitalik Buterin and co-founders
- Native token: ETH (used for gas fees and staking)
- Supply model: Deflationary via EIP-1559 fee burning
Introduction
Ethereum is the world's leading programmable blockchain. Unlike Bitcoin, which primarily functions as a store of value, Ethereum is designed to run smart contracts — self-executing code that enables decentralized applications (dApps) to operate without intermediaries.
ETH is the native currency of the Ethereum network. It powers transactions, pays for computation (known as gas fees), and is used for staking to secure the network.
History & Background
Ethereum was conceived by Vitalik Buterin in 2013 and co-founded alongside figures including Gavin Wood, Joseph Lubin, and others. The mainnet launched in 2015, introducing the concept of a Turing-complete blockchain for the first time at scale.
In 2022, Ethereum completed The Merge — a landmark transition from Proof-of-Work to Proof-of-Stake, drastically reducing its energy consumption by over 99%.
How Ethereum Works
Ethereum runs on a decentralized network of nodes that validate transactions and execute smart contracts. Developers write contracts in Solidity (or similar languages), which are deployed on-chain and run automatically when conditions are met.
Gas fees compensate validators for computation. Since EIP-1559, a portion of every transaction fee is burned, making ETH deflationary under high network usage.
Validators must stake 32 ETH to participate in block production and earn rewards, replacing miners in the post-Merge era.
Tokenomics
ETH has no fixed maximum supply, but issuance is kept low and offset by fee burning. During periods of high activity, more ETH is burned than issued, reducing the total supply over time.
Staking rewards are distributed to validators, creating an incentive to hold and lock ETH rather than sell it.
|
Circulating supply
| 120.68 million ETH |
|---|---|
| |
|
Total supply
| 120.68 million ETH |
|
Max supply
| -- ETH |
Ecosystem & Use Cases
Ethereum hosts the largest ecosystem in crypto, including DeFi protocols, NFT marketplaces, DAOs, and thousands of dApps. Major protocols like Uniswap, Aave, and OpenSea are built on Ethereum.
Layer-2 networks such as Arbitrum, Optimism, and Base extend Ethereum's capacity by processing transactions off-chain and settling on Ethereum's secure base layer.
Team, Governance & Community
Ethereum is stewarded by the Ethereum Foundation, a non-profit supporting research and development. Protocol upgrades are coordinated through Ethereum Improvement Proposals (EIPs) with input from developers, researchers, and the broader community.
No single entity controls Ethereum, making its governance decentralized and community-driven.
Advantages
- Network effect: Largest smart contract developer community and dApp ecosystem.
- Security: Battle-tested since 2015 with robust validator decentralization.
- Composability: DeFi protocols can interact seamlessly, enabling complex financial products.
- Sustainability: Proof-of-Stake makes Ethereum energy-efficient at scale.
Risks & Challenges
- Gas fees: Base-layer transactions can be expensive during peak demand.
- Competition: Alternative Layer-1s offer lower fees and faster finality.
- Complexity: Smart contract bugs can lead to significant financial losses.
- Regulatory risk: ETH's classification by regulators remains a moving target in some jurisdictions.
Long-Term Vision
Ethereum's roadmap — including upgrades like Danksharding and continued Layer-2 scaling — aims to make the network capable of handling global-scale usage while keeping fees low. The long-term goal is a fully decentralized, censorship-resistant world computer that serves as the settlement layer for the open internet.
Frequently Asked Questions
- What is Ethereum used for?
Ethereum is used to run smart contracts and decentralized applications, ranging from DeFi protocols and NFT platforms to DAOs and Web3 services. ETH, its native token, is also used to pay transaction fees and as a staking asset.
- What is the difference between Ethereum and Bitcoin?
Bitcoin is primarily a decentralized store of value and payment network. Ethereum is a programmable blockchain designed to host smart contracts and dApps, making it a broader platform for decentralized computing.
- What happened during 'The Merge'?
The Merge, completed in 2022, was Ethereum's transition from Proof-of-Work mining to Proof-of-Stake consensus. This reduced Ethereum's energy consumption by more than 99% and replaced miners with validators who stake ETH.
- How are ETH gas fees determined?
Gas fees are priced based on network demand and the computational complexity of a transaction. Since EIP-1559, fees consist of a base fee (which is burned) and an optional priority tip for validators.
- Is ETH deflationary?
ETH can be deflationary during periods of high network activity, because EIP-1559 burns the base fee of every transaction. When burns exceed new issuance, the total supply of ETH decreases.
- How do you stake ETH?
To become a solo validator, you need to stake 32 ETH and run validator software. Alternatively, you can use liquid staking protocols or centralized services to stake smaller amounts and still earn rewards.
- What are Ethereum Layer-2 networks?
Layer-2 networks like Arbitrum, Optimism, and Base process transactions off Ethereum's main chain and settle them on-chain, offering faster and cheaper transactions while inheriting Ethereum's security.
- Who governs Ethereum?
Ethereum has no single owner. Governance is managed through a community process using Ethereum Improvement Proposals (EIPs), with the Ethereum Foundation supporting research and development coordination.