ICOs will evolve into STOs (Security Token Offers) which are mostly the same thing, but regulated. Unfortunately ICOs are raising funds from the public without any rule, some of them are scams and other ones do change rules after they announced things, even after people have invested in them. I do not like regulation, however I don't like to be in the "law of the jungle" either. There has to be some order and unfortunately this means some kind of regulation. Also, I don't think that they will be as attractive as today. They will change, evolve, and adapt.