There are so many projects as such and we should have an ability and experience to select good ico to invest. Some of them are scams from the begining and some of them become scams with the course of the time. And some of good projects stuck on their half way of the project due to development team problems and advisory team issues and in this case we cannot do anything as it had been doing their project well. But in the first two scenarios we can avoid getting in to trouble after doing a thorough research about tge projects