If you askin about how to find scam coins, it's simple to answer, check website and development team, and also you must check whitepaper before that, but sometimes they are very close with trusted project, but there are always have a gap!
It's not easy as you say, finding a coin scam is very difficult for us to detect because they also commit crimes very carefully, even they are able to fake the team and their Whitepaper, it's better to prevent by choosing coins that are in the top 10 at CMC.
So choosing top ten coins in cmc is the best way to avoid invetsing on a scam projects? So how about exploring more in cryptocurrency? Do you think you will learn more in this vast business just by staying on those top ten coins? Yes it's not easy to detect scam projects but let's just make it a gamble and study carefully the white paper of each project we want to invest with.