Bitcoin is one of the reason why online gambling casinos became popular. It made the gambling more accessible to many people and you can also protect your privacy by using it.
Actually, Online casino has been there for a long time even before crypto however the payment method is very limited as only bank transfer, PayPal, and other way to pay through fiat. Cryptocurrency especially bitcoin has paved the way to make the online casino more convenient as the transaction can be done through various cryptocurrencies and provides more privacy to the identity of the gambler.
If you are playing on a crypto casino then bitcoin is definitely supported there. You should check what payment methods they are accepting. Some also accepts other crypto like DOGE, ETH, XRP. You can also use some stablecoins like USDT or BUSD if they support that type of cryptocurrency.
That's one thing that is great for crypto casinos as they offer various payment methods for the gambler which is more convenient for them. Anyways, apart from cryptocurrency some online casino also offers normal payment methods such as bank transfer, Paypal, and other fiat transaction.
OP can try to visit Stake gambling platform as it offers various ways for withdrawal and deposit on the platform. Also, it is one of the most famous and trusted crypto casino out there.