I only invested 2 icos and i read their whitepaper twice before doing my investment. I believe the most important thing is reading their whitepaper and analyzing the project deeply. So i think i am doing right. Investors should read projects whitepaper detailly and they need to decide according to that. You can understand everything about project with using their whitepaper. Dont be lazy.
Well, but why don't you name those projects you've invested in? There're many professionals who will tell you whether they're good or not. And, ofc, whether we can trust you or not.