$ETH or Ethereum, is the second-largest cryptocurrency by market cap after Bitcoin. It powers smart contracts and decentralized applications (dApps) on the Ethereum blockchain. ETH is used for transactions, staking, and paying gas fees. With Ethereum 2.0, the network has moved to proof-of-stake, improving scalability and energy efficiency. Developers continue to build DeFi, NFTs, and more on Ethereum, keeping it a vital part of the crypto ecosystem. Price movements are often influenced by market sentiment, network upgrades, and institutional adoption.