Can be many, if not greedy.. but can be broke all too ,but i never heard people earn money by just gambling.
But gambling gives them fun and excitement,that makes them gamble even they had no chance of winning.
I'm not sure that gamblers can get a very big advantage. For all people will surely use the greed in every victory he got or they will always be curious when they get their defeat. The key to not have a defeat in gambling is doing self control
Definitely, but in reality it is hard to have a self control once you are in the middle of the session due to the mixed emotions that you are feeling, if you are matured enough you have a good chance to control your self but for young gamblers they will play with their emotions.