What's the REAL reason(s) so many "top" players are busto?

[Zorlac]

Take your pick:

paste--------------
Serotonin is a chemical in the brain that plays a key role in regulating mood and behavior. Norepinephrine, a hormone released in response to stress, has been linked to arousal and risk-taking in compulsive gamblers. Brain cells release dopamine as part of the reward system through which you learn to seek pleasurable stimuli, such as food and sex, and dopamine plays a role in developing addiction.