I have join ICO once as investors, and it not end well  because price in market is not really good after listed and it keep getting worse only in time. For me, ICO is something that almost like gambling because actually we don't know what will happen to project that we invested and then profit or lose is always depends on the project itself. But when you pick good Project, or at least know when to sell the tokens, you can get profit because usually after listed on market, it will get pumped a little. Maybe take chance on that time is good thing. About Ethereum, it already steady and stand in market although ICO trend not come yet, so i think no matter ICO is happen or not, Ethereum, bitcoin and other coins will be good as long there are demands on market.