investors should be very careful with those ones and should have in-depth considerations before deciding to invest their money. Most of them are scam ones, part of them are real ones, and small part of them are good ones.
Good luck with your decision!
not only trust and careful investment, there are many other references. in addition to the team whose background, project concept, roadmap, work partners and products will be known. that is one node that will give a decision for investment.