There is many Casino accept btc.
Yes online casinos,
By the way if you are talking about casinos that's been known to everyone like what we are seeing in the movies and cities I think BTC can be used on that casinos (I don't know if there are one who are accepting as of now) but people there are rich and people the chips are pretty expensive so it is possible to buy your chips using BTC and then get that and play. Simple.
I have no idea if casino will ever accept bitcoin as exchange for chips that is used in gambling.
Are you not aware that the bitcoin gambling industry is big?
Look on how many casino's are here in the forum and look on how wide the crypto gambling industry is there.
And the answer is obvious mate.
It's not the matter of how big the industry, it's the people that playing that are craving to gamble, it doesn't matter if they will use BTC or fiat, what matter to them is that they have something to gamble.
Bitcoin is already used as a currency in Online gambling. That's a good idea as an alternative in casino. but I think more efficient use of cash because the transaction can be done quickly
A build in system meant for cryptocurrencies ( or for the people who are playing crypto in casino is easier ), we just don't know if they are adopting crypto. Let's wait for another year and then stay up tuned in the news.