To identify a good/bad coin for investment whether long term or short time, I usually scrutinize the white paper and the project goals. Whats its going to solve and the whole team behind the projects. Whether it is backed by a business model that is already operational or not.

Take a look at https://www.te-food.com/ reached token sale hard cap in minutes, the idea behind the project is tried and tested as it is backed by a business model that is already operational. Those are some of the few things that I check. I don't normally follow speculation coz speculative coins can only go as far as that but real projects will stand the test of time.