I personally have bought quite few, usually the Ethereum based ones mostly do good. Had some disappointments though. Wasn't very successful with the wave based ones ...
What about you ?
as far as I've done, every purchase or investment on altcoin, I always involve my knowledge and experience to analyze so that I believe my chosen coins can flourish. no matter in the end the prediction slips, because after all, always have a risk in every purchase. so I just want to suggest to you, there is much you can get from crypto, one thing you have to do. always looking for knowledge at all times.