I have not get good luck in investing into icos and the few one that I have invested is not doing very well in the market. Icos investments is very risky and many investors have lose significant amounts of money. I don't think we can really succeed the ways people and investors are losing money through icos scam projects.
One has to do a lot of research before investing in ICO's, its true that there are scammers out there who are pretending to be the real deal, only for investors to lose their money after investing in the project. IMO, there have been successful ones which has deepened the pockets of investors and more upcoming ones which look promising. But if you are tired of ICO's there are still other ways to invest in blockchain, for example, consider Hooch, not your typical ICO but the concept is wowing, they are tokenizing the rewards ecosystem by giving their users Tapcoin and discounts off their drink purchases, hotel bookings and access to reservations at top restaurants. And because Hooch is already an existing platform which is embracing blockchain, it is something worth investing in.