Check the volume of that coin and you can determine if they are crap or not.
This is a very an effective method that will surely work for an already established project, but for new coins, volumes might not be enough to distinguish good ones from bad ones, especially when the coins are new, that is when they get enough volume from traders that are very smart, they buy these coins very much and wait for it to pump and dump them.
It is during this pump waiting time, that accumulation becomes so high making the volume of the coin go high, and that might be the time an investor who took your advice comes to make investment decision. Volume is good but not to be the only determinant factors, we should only take volume as part of our many parts of decision.