It is true that there are many ICO's arising nowadays and we have to choose the best one because there are many ICO's which are scam and fake. You must have a research on what ICO will you pick so that you can avoid scams.
How to choose good ico, most of icos are scam and it is hard to even see if ico is legit. i will do research on team, whitepaper and if something sounds fishy i will stay away from it. if it sounds too good stay away from it. be smart and be careful.