Well some of the things I do before investing that have worked great for me is (I'm gonna butcher it down because I know you don't actually care you're just mad I called you a shitpoter);
1) check coinmarketcap, i'm mostly interested in the exchanges the coin is listen on as well as the max supply/circulating supply, is it minable? is it a token? ect.
2) check their website, find out who the team are, who are their advisor? and their experience in the sector.
3) what are they trying to achieve, who is it targeted at, does it have any real world use? are their goals being met? how much has it progressed? was the coin mass mined before release? was the ico sale money put to good use?