According to estimates and statistics of bookmakers less than 1% of players in general are successful.
That's pretty low, maybe this is true because gambling is a game of luck and we know that house always win and they are the one who make a lot of big profit. Lucky to those 1% population of gamblers, they must have a better life now. I never met a successful gambler, they are hiding from me because they know I will ask for some money. 