Ethereum
Inspired by the narrative of Bitcoin, 19 year old Russian-Canadian programmer Vitalik Buterin, envisioned a more powerful blockchain – capable of handling complex conditions automatically. In 2015, Ethereum launched to the public with smart contract functionality that powered the ICO boom in 2017.
Ethereum's smart contracts have since been used more creatively – powering the decentralized finance and non-fungible token (NFT) revolution.