According to me, the altcoin that I think will grow in 2018 are ethereum and ripple. Form the beginning I joined crypto currency and knew these two coins then I fell in love with both of them. I am sure that one day these two coins will succeed with great strength. Ethereum excels as an almost perfect coin. We can easily create blockchain - based applications just by riding on the ethereum blockchain platform. Whereas when using ripple, we will be spoiled by transacting in large numbers at a time, only taking a few minutes. That is a bit of my idea.