I prefer strategic gambling with amount that I can afford to lose. No gmabler become suddently rich by gmabling, let alone being billionaire. But, by running a gambling site, you can definitely be a billionaire. 
yeah gambling is not a way to become rich it is only a service providing some games for fun in order to get entertained,established by some businessmen, and as they start that service as their business so they will earn better, and from any business or site you start you will earn a good amount.