It's very important to get some useful information in everything we want to invest in not even in crypto alone. Take time time to do a little findings about that ICOs because it can go along in saving you of some problems.
- check the telegram community and see how many people are interested in investing in such ICO
- check the website and see if they have product they are building on, if they do, how reliable it is
- read their white paper to see what the road map looks like
- follow crypto news from reliable sources
- it will also help if you tell a reliable friend or someone you trust that knows about crypto than you.