I think it's smart contracts coins. Waves soon gonna launch their own app as far as I remember and it's gonna pump it's price. NEO is also one of the most promising coins and Ethereum is the prince of cryptocurrencies 
Smartcontract will become a mainstream blockchain infrastructure. How a lot of these projects are comiing to issued their own smartcontract. As far as i know just like credit and universa which has already used by some company to issued their tokenization in the future. But it looks like another service just like rent car will be booming soon.