As I known, ICO is a kind of risky investment. Similar to the IPO which is the form of invite for capital investment, but when buying IPO, investors can research the information about the company they invested, find out about official finance reports and be protected by law when joining. In contrast, ICO projects are often rather ambiguous and unprotected by government so the risk is so high for investors.
So how to evaluate a potential ICO project, look forward to receiving comments from you

At this moment, it is really hard to filter out the real project. My technique to know some is through looking at their telegram account and see how things go there. I observe it and decide whether or not I will invest my time in it.