Some cryptocurrencies share a blockchain, though other cryptocurrencies run on their own different blockchains. Ethereum was established in 2015 by Vitalik Buterin, a Russian-Canadian programmer. The System is based to the theory of decentralization, meaning that it is not managed by any single entity. Bitcoin was made in 2009 https://alexiskbpdt.smblogsites.com/29721380/about-copyright