I think very few people will say that they have not been scammed once or more than once. At some point you have to start praying that the ICO you invested in doesn't turn out to be a scam because of the increasing rate of scam ICOs. You may invest in a promising ICO and it wind up disappointing at the end of it all. Makes me wonder if one has to cast a lot to invest in ICOs since even potential ICO projects some times turn out to be scam