These days everyone is trying to have their own ICO which is making entire industry shady. People are easily falling for scams. Keep an eye on the reputation section to see the fake ICOs.

I am not saying that all ICOs are fake but there are good ICOs as well. To determine a good ICO I look for
=Good team
=The product
=Token usability
=Marketing

If these are good enough then it's ok to take some risk. Don't go all but invest that you can afford to lose.