Was the team anonymous? The best way to go about your investments in the early stages of a project is to make sure that you know who is behind it. I gave up on investing in any project where the team wants to hide their identities. They say they would have to because of legislation and bla bla. Even if some of them are honest it is still not worth the risk to be left with empty hands and you can't even officially blame anyone or warn others. The best resource is a live Q&A or video on youtube because they even use fake IDs on their websites.