Never invest without documenting first. I would recommend ADA, XLM, TRX, NEO. I did something I didn't see anyone else doing, since I am a Software Engineer, I analyzed the work the Cardano programmers do, how they fix things, what they are working on. I made an article and I even bought some ADA :D
https://steemit.com/cardano/@alexdory/adabtc-shows-signs-of-bullish-wedge-breakout
Always think for yourself, never invest without documenting.