no one knows exactly where the scam and what is not, except maybe he has the 6th sense may be hehe, the point back to dirikita each, we do something we really understand and we know. my advice is more careful, because it all depends what we do as well. yes so lah I never experienced it because I myself was not careful.
Actually you dont need 6 sense to determine wether a project is a scam or not, since I got scammed on ny early time on cryptosystem. I actually learn how to choose wisely a project I would choose to invest with. I usually look at the credentials of the people behind the project. There is no project that is too good to be true, i rather choose something that profits not that much but the project behind it really works. I also invest on something I have background knowledge, I don't just throw off money in a project I really dont know.