my suggestion is ripple and ethereum, they have grown very impressive , i think when people are positive about the market, they will go up and up, keep holding them for long term is a good choice
Blockchain and smart contract will be the future of the world. That is why I believe Etherium, Ubiq, and Digibyte are great coins for long term investment. If you are looking for a low cap smart contract coin, Ubiq will be a good choice.