This is a good question I think. And everybody should research well before investing their money in ICO projects. The best way is to read white paper as well as research well about the company reputation. I did for SciDex. Looks like a good one. What's your opinion?
I dont think so that by just studying about any of the crypto currency will then help you in knowing that whether any of the crypto currency is scam or not. To know this thing, you must go for investing your money into any of the crypto currency and then, once you will deal with that crypto coin, you will get to know whether it is scam or not. It is better to invest only in reputed crypto coins to avoid any such thing.