The best way is don't invest 
. This year is a difficult year for ICO after the explosion of ICO in 2017.
I agree with you man ! Some investors have their own factors they considered before investing some funds to the ICO projects because they are afraid to be scammed or can't make profits on it but in order to avoid scam ICOs totally , is not to invest on it.. This year is a difficult year for ICO after the explosion of ICO in 2017.