In terms of market share, Ethereum is the most frequently utilised blockchain, trailing only the decentralised open source ledger of Bitcoin and cryptocurrencies. It was formally launched in 2015 and includes a smart contract feature. Ethereum's smart contract framework elevates the coin, and new DeFi coins will be built on top of it. It is entirely independent and no one controls it because it is a decentralised system. Because it is run by thousands of volunteer computers across distant worlds, there is no single point of failure. Ethereum is an open-source cryptocurrency that is the most widely used blockchain and the second-largest cryptocurrency in terms of market capitalization after Bitcoin.