We just need to watch what is team doing, if they are working hard then it's not scam. It's better to invest and hold for a long time to make huge profit but you need to choose project carefully
We can say projects are dead if it is a scam because as an investor your capital money that you put up for that project was already dead coz surely you will never earn an income or a profit in that project, and the other situation is that when the project is not successful maybe said project is dead.