Ethereum (ETH) — Complete Guide

Ethereum is the largest smart contract platform by total value locked, developer activity, and ecosystem breadth. Launched in 2015, it introduced programmable blockchain logic through the Ethereum Virtual Machine (EVM), enabling DeFi, NFTs, DAOs, and thousands of decentralized applications. Its September 2022 Merge from Proof of Work to Proof of Stake reduced energy consumption by over 99.9% while maintaining security.

Ethereum's EVM executes Solidity and Vyper smart contracts deterministically across all nodes. Since the Merge, validators stake 32 ETH to propose and attest to blocks, with slashing penalties for malicious behavior. The Beacon Chain coordinates ~900,000 active validators who collectively secure the network. EIP-1559 introduced a base fee mechanism that burns ETH with each transaction, making ETH deflationary during periods of high network activity. Layer 2 networks (Arbitrum, Optimism, Base, zkSync) use Ethereum as the settlement and data availability layer, scaling throughput to thousands of TPS.

Ethereum is the foundational infrastructure layer for decentralized finance, enabling trustless lending, borrowing, trading, and yield generation without intermediaries. It hosts over $50 billion in DeFi TVL and processes stablecoin settlements worth trillions of dollars annually. Beyond finance, Ethereum underpins NFT ownership, DAO governance, identity systems, and real-world asset tokenization.

• +Largest DeFi ecosystem — Aave, Uniswap, MakerDAO, Lido, and hundreds of protocols
• +Deflationary tokenomics via EIP-1559 — ETH supply can shrink during high activity periods
• +Proof of Stake consensus with 900,000+ validators — most decentralized PoS network
• +EVM standard is the industry default — nearly every L1 and L2 supports EVM compatibility
• +Native liquid staking via Lido, Rocket Pool, and staked ETH on Coinbase and Binance
• +Rollup-centric roadmap scales throughput while preserving decentralization and security

• !High base layer gas fees during congestion remain a barrier for small transactions
• !Validator centralization: Lido controls ~28% of staked ETH, creating governance concentration
• !EVM complexity has produced critical bugs in major protocols (DAO hack, Parity multisig)

ETH staking earns ~3–4% APY at current network conditions, paid in new ETH issuance plus priority fees. Solo staking requires 32 ETH (~$100,000+) and technical setup of a validator client. Liquid staking through Lido (stETH) or Rocket Pool (rETH) allows any amount of ETH to earn staking yield with no lockup — stETH and rETH can be used as collateral in Aave and Compound. Coinbase (cbETH) and Binance (BETH) offer exchange-based staking without custody requirements for hardware. Restaking via EigenLayer allows staked ETH to secure additional protocols simultaneously, earning extra yield on top of base staking rewards — currently 1–3% additional APY from EigenLayer AVS rewards.