$ETH Ethereum (ETH) is a decentralized, open-source blockchain platform that enables smart contracts and decentralized applications (dApps). Launched in 2015 by Vitalik Buterin and others, Ethereum introduced programmable blockchain technology, allowing developers to build and deploy their own applications without centralized control. ETH is the native cryptocurrency of the Ethereum network, used to pay for transaction fees (gas), secure the network through staking (as of Ethereum 2.0), and facilitate decentralized finance (DeFi), NFTs, and more. Known for its innovation and adaptability, Ethereum remains one of the most influential projects in the crypto space, second only to Bitcoin in market capitalization.