Launched by Vitalik Buterin, Ethereum turns four years old today. Its project was first proposed in 2013 and later launched on 30th July 2015. After bitcoin, Ethereum is the second-largest cryptocurrency in the world. It is a blockchain-based open-source distributed and decentralized computing platform where users can create new crypto assets which are known as Ethereum tokens. It takes 14-15 seconds for Ethereum’s block whereas Bitcoin’s time which is 10 minutes.