My picks from your list:

Airswap - Decentralized exchanges are the next big thing in 2018 and beyond. I would get in on all of theses types of investments and we'll see which one flies. This one happens to have great backing, including Novogratz as an adviser.

Substratum - If this thing works like everyone hopes it does, forget about it.

Ethos and Salt will do fine, but high market caps already.

Nav, Spectre, Onion, good coins, highly speculative, big potential returns.