You better must know the people behind them.
It is critical to know the nature of the company and the teams behind ICOs. Most of the companies are newly incorporated, but many founders have been around in their respective industries. It is possible to review profiles and search for news and mentions in their prior projects and efforts and also Nitpicking the white paper could prove useful in revealing the details of how their solutions work and what need areas they will be addressing.
I agree with your statement. I will add from myself that it is probably very difficult to make the right choice, because it takes a lot of time for an in-depth inspection of the company. But definitely you need to understand the details of the proposals. Learn and communicate with the developers. The moment of communication plays the most important role and it is here that the reliability of the project is checked.