Greed: excessive or reprehensible acquisitiveness.
Reprehensible: worthy of or deserving.
Acquisitiveness: strongly desirous of acquiring and possessing.
In short, greed is merely a strong or excessive desire to obtain or acquire. Not exactly, an undesirable trait for one seeking success. Thus, I disagree with the notion that one possessing the trait of greed is doomed to failure.
I am of the opinion that DISCIPLINE or rather lack there of, is the most common cause of failure.
Discipline: control gained by enforcing obedience or order.
Failure is the result of those lacking the trait of discipline (control) not greed. Example, greed is not the reason dropouts fail to complete school…lack of discipline most likely is.
Those possessing excessive or reprehensible discipline are also likely to succeed in their endeavors as opposed to those who do not.
More specifically, I am of the opinion that some of the methods currently utilized by bookmakers and gamblers do not achieve the desired objective, and that is, controlling, minimizing and/or eliminating monetary risk.
Thus, the “reason” bookmakers and/or gamblers go broke is the result of their lack of discipline as seen by their “inability to control monetary risk” while utilizing methods which do not assure them the profits of success.