I think there are guys who are living to play gambling but I don't think there is a person who makes gambling his main source of income because it is nearly impossible since the probability of winning on any gambling is not a hundred percent sure. I know a lot of guys who live their life on gambling but they also have a job that can support their daily expenses and their investment before they gamble. Even me, I am gambling with a lot of money but I don't think I can live my life just gambling because it may affect a lot of things in my body. I am only gambling when I have extra money but if I don't have, I am not letting myself cut the food or other expenses just to gamble because I know that gambling is not a sure income and might kill all of my investment.