If I had any substantial amount, I would make sure they were on USA exchanges. You do have some recourse if they go belly up. Not 100% but there is some oversight. Foreign exchanges, your just screwed. Bittrex is a good US exchange
Do your own DD, my posts are highly opinionated. If you do not agree with my posts, feel free to block me. I am not an investment professional nor do I give investing advice. You alone are responsible for your investments