Altcoin which is my favorite is ethereum. I highly idolize ethereum because ethereum is an almost perfect coin on blockchain technology. Ethereum has almost no defects. I myself saw the benefits that ethereum brought so that it was not surprising that ethereum was nicknamed the king of the ICO. As king of ICO, ethereum managed to make almost all ICOs use the blockchain platform. In addition, the smart contract technology brought by ethereum is very innovative and has been proven to facilitate work. I am very amazed by ethereum and I plan to have it as much as possible.