If you want to take advantage of ICOs, you don't have another choice but to believe in ICOs, no matter what. Yes, there are a lot of scams and distrusted companies, but it doesn't mean that the there are no good ones. Just a little bit more thorough due diligence is required in order to avoid such scam ICOs, and everything will be just fine. 
I think many people want to invest in ICO because ICO is now very difficult to believe because many people are afraid
because ICO project is very risky if you want to invest in ICO then wait for the right time and select a reliable project