Nowadays most of the altcoins are best in the market. But I predict some of the coins are good future in 2018.
 1. Ripple
 2.Neo
 3. IOTA.
 4. Monero
 I don't explain this coin because many of them know about this coin. These coins are familiar in all crypto market. But these coins are only altcoins. I mainly support to Bitcoin. This is the only master of the cryptocurrency.