Well there are tons of professional poker players that manages to win hundreds of thousands, if not millions in one seating/tournament. There are also those who live off purely of betting on sports and/or other events. One notable person I follow who lives his life through playing poker professionally is Erik Seidel. We all know his magic hands and how much WSOP bracelets he have in his arsenal (. You also have Daniel Negreanu who bagged 6 WSOP bracelets and was considered one of the best poker players in 2014. It is possible though again, you need to have an extreme amount of luck, experience, skill, and of course, starting money in order to live off your life with just gambling.