Avoid BCash. If we were in regulated markets the people behind BCash would be going to jail for market manipulation and collusion.

Investing in NEO over Gas seems senseless, since you can gain Gas by staking NEO. Waves has the highest potential short-term multiplier, but nobody knows if it will catch on or not right now. Ethereum is the go to for ICOs, at least currently, so it at least shouldn't lose your money (although that is always a possibility).

In general, do your own research and be careful whenever somebody tells you what to do with your money. They're probably trying to exploit your lack of knowledge in one way or another.