we can find icos to invest in icorating.com and trackico.io and icobench.com all these websites are ico rating websites
Although this cannot be used as a guarantee of the success of an ICO, but many make it a reference. choose one of the most visited and make in-depth research.
There is also a thread for the ico, but you can choose the best of them on the following they give. Yes not all ico that's appear to that websites are have a potential to success but you can choose which is the good ico that you can invest your money on that websites.