Depending on many factors everybody evaluating for himself. I think team, experience and idea itself are the core. If you believe in them, go ahead to ico. If not, wait, maybe it will not reach exchange
It's not enough just to believe in the team!The project that goes to the ICO should be all right with the documentation!The very meaning of the project should be clearly stated,and it is desirable that they already have a product that they plan to present!