It depends on how you treat gambling. If you are treating gambling as a way to become rich then probably your crazy. But for me, in my own experience. Gambling ruined my life. That's why I changed now somehow.
Of course everyone's thinking that gambling can somehow make them rich that's why they try their luck in gambling. Does that mean everybody's crazy?
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.
I believe you can't become a billionaire in bitcoin casino. You might earn thousands of dollars or more than a million if your bitcoin casino goes popular, but I doubt that you can become a billionaire out of that. Consider how many people in the bitcoin community aren't gambling, and consider that the whales just play on the site they used to play.
If you can get thousands of whales out there then you might millions or thousands of dollars but not billions.
