There are two reasons for getting scammed, one, you are very greedy and want to take a short cut road to success. Therefore, when you see an offer, you just grab it and get scammed. And two, you are ignorant, you do not research and try to find whether the offer is reliable or not.
Whenever you are too quick to jump into any kind of Investments, there is always a high possibility of being wrong because without making research, there is no way you can be able to know if that kind of investment project is something that is not a scam.
There is always an information out there which can help you to know whether you are making a right decision or not with regards to any kind of investment.