its very difficult to identify a shitcoin.. they are hiding 
even after so many research you do on that coin still you are not convince that is a shit coin..the moment you realize its a shit coin is when you bought some and afterwards its has no more value
True! It easier to say a coin isn't good than say it's bad! You can determine a "not good" project by doing research. I suggest you do not ever invest your money into a project that seems "not good enough" or "too good". When I do my research, if I have any doubt about that project, I will stop thinking about investing in it! even after so many research you do on that coin still you are not convince that is a shit coin..the moment you realize its a shit coin is when you bought some and afterwards its has no more value