There are a few topics you need to find out before investing. Most importantly, what is the nature of the ico that is being implemented has practical benefits for the user. If an ico does not have a useful value for investors then it will die. Some details to consider, for example: CEO, partner, price, marketting. You should also refer to some sites that evaluate ico.
isn't this topic old already? so wrote on the forum, you should find the information you need. it all comes down to a simple analysis of the site, team and white paper, hardcap and softcap. But lately a lot of scams so no advice works at 100%