$ETH ETH, or Ether, is the native cryptocurrency of the Ethereum blockchain. It's the second-largest cryptocurrency by market capitalization, following Bitcoin. Beyond a digital currency, ETH powers the Ethereum network, which supports smart contracts and decentralized applications (dApps). Its use extends to transaction fees (gas), staking, and participation in decentralized finance (DeFi). The Ethereum ecosystem's ongoing development, including upgrades like the Merge, impacts ETH's value and utility. Its role in Web3 and decentralized computing makes it a key player in the crypto space.