$ETH ETH, or Ether, is the native cryptocurrency of the Ethereum blockchain, which is known for its smart contract functionality. Launched in 2015, Ethereum enables developers to build decentralized applications (dApps) that run on its network, facilitating various use cases such as decentralized finance (DeFi) and non-fungible tokens (NFTs). ETH serves as both a digital currency and a means to pay for transaction fees, known as "gas," on the Ethereum network. With its robust ecosystem and continuous upgrades, including the transition to Ethereum 2.0, ETH remains a pivotal player in the cryptocurrency landscape, driving innovation and adoption.