I will pick top coins like ETH, XRP, XLM, DASH and NEO. I think it's very good time for us to buy that coins because i still confident in the end of this year all of that coins will rise untill x2-x3 from the current price.
Well these are definitely all very safe investments while waiting for the bull run but they probably wont be able to make you rich. For that you would have to choose some wildcards aka low/mid MC coins that you strongly believe in. No risk no reward (A hyperbole I know as investing in crypto is risk in itself).