The best way for you to do this is to do your own research and not follow the things that other people say. You are going to want to check out the team members of the coins to make sure that they are actually the people who are working on the coin. Also look at the product to make sure that it is a product that you can be sure will be viable for the long term
There is actually no other way at all than that. One thing I have known is that no matter how much some people want to keep lazing around, avoiding the aspect of due diligence as bounty hunters, they will eventually realize that this is something they just simply have to always do some good research just as an investor will do before participating in a project.
You are using time and resources, and you just won't want to be wasting that time on some shitty project with no future. The most important thing is just to look at two major things, the project team members as well as the product available. If those are not intact, then, there is a huge red flag.