It looks like you are only counting for the scam project but you are not aware if there was a lot of successful icos.
It's better for you to visit this site
https://icodrops.com/ and look at the previous ico list and there was a bunch of successful icos. The future is still really bright.
Most of the project listed on ICOdrop do not actually do ICO but IEO, especially recently. Ferrum network is the only ICO on the website since August others were IEO, however, high percentage of the project raise fund through private sale before the IEOs. Private sale is mostly for high capital investment and sometimes longterm holders.