Certainly it could be depending upon its acceptance worldwide firstly and secondly if country allows the gambling as legal for that matter. So bitcoin could be future of online gambling but still need wait for a long time to see many gambling site will accept bitcoin as a one of a payment.
We can already see what is happening with bitcoin gambling now. And I must say that bitcoin has the potential to conquer the gambling industry. Because of its characteristics and all of its good qualities are being liked too many gamblers, investors and gambling site owners.