The founder of ETHEREUM said that over 90% of ICOs are scams. By participating in an ICO, you give your money to a project that probably will never happen. Every day a new ICO comes out ... but what surprises me is that many people invest their savings in these very high risk projects. I think it is much better to invest in real projects already listed on the stock exchange .... of which you know everything well ... For example, BANKERA looks like an ICO scam .....
Based on my experience , I gotta say that most of the ico's are scam but it's not like 90% , I think that percentage is too much to say because some of the ico's are legit and can give you some good amount of profits.