Bitcoin and Ethereum both are so potent and greatest coin. I love those coin so much. Bitcoin is the king of cryptocurrency and Ethereum is the second king. I think only Ethereum can defeat Bitcoin. Bitcoin is now the most popular currency all over the world. Ethereum popularity is also increasing day by day. At the present time. all the ERC20 token are Ethereum based. People love both because Bitcoin and Ethereum is the most secure coin. They have the high-security system.