1 you must understand about the history of ico (team, WP, etc)
2 try to identify the ico if the users in their telegram groups are a real person by seeing the activity in the telegram group itself.
A trusted ico will make transparency and make investors can identify the ico itself.
But rather than it, you can try to take a look at the trusted coin this time like veil, and it was building a new privacy technology that used a new mechanism and that founded by a trusted person like James burden. A lot of people very well knows him as PIVX founder.