I think this is also the question of many others, especially investors. In my opinion, this is not easy because everything in the future is unknowable. The only thing we can do before investing in an ICO is to learn it thoroughly. Their development team should be qualified, trusted by many and experienced. We should also look at the white paper of the ICO project, looking at their route, their development goals. Besides, If it is trusted by many people, it will be better. I'm not sure that these things help you distinguish, that's just my advice