It is true gambling would be one of the main attraction of Bitcoin .
Crypto currency is the best for gambling sonce it have anonymity gamblers wouldn't worry about their identity while gambling specially for those who doesn't want their friends or family to know that they are gambling.
And for me the best crypto casino right now is
Stake since it have all of the games and it have so many give aways or challenge for us gamblers.
If there are many recommended gambling website in out there, bitcoin will be known as one currency for the gambling, and I think it's already happening because people who come to the bitcoin gambling casino only know bitcoin. That will make bitcoin become popular among the gamblers and will attract more gamblers to comes.
But people will not only use bitcoin as the bets because on the gambling website, but people will also know that many coins can be used for the bets.