If you are motivated by greed, it will lead you to make poor decisions. As a real estate investor, and if you are continue making poor decisions one of these poor decisions will end up costing you big time.
b. Lack of due diligence
Wannabe investors did not do any of their homework, and got involved in real estate transactions that they had no business getting involved
with in the first place.
So read, read, read, and learn as much as you can from the best of the best in the field through the help of real estate education.