Before investing in ico always check this:-
1.check how many tokens are offered for presale and the number of ICO participants,before investing.
2.check if the will provide potential investors with answers to questions via social media or the company’s blog.
3.check there whitepapers This document describes everything about the project which includes the idea, technology driving it.
4.check  if the company are willing to publish to you information about its team members. And also  How many years of experience do they have.