Yeah this is no difference even if the market is bearish people will still play a lot in the casino, there is still an alternative if the price of bitcoin fluctuates greatly then they can switch to stablecoins... Casinos have offered many options for deposits, players will never decrease.
I can assume that many casino users have never dealt with Bitcoins and other cryptocurrencies at all, providing their deposit at the casino with fiat. And they play in casinos for the only reason that it is a great pastime for them, and not a desire to increase their deposit in BTC.
I think there are people who prefer to deposit with fiat rather than with bitcoin/other altcoins.
In BTC deposits will not add anything, the important thing is that they have a lot of betting volume then it claims rakeback every month.
Dealing with market volatility is not a concern of the gamblers since they are not doing any trades of any coin they used to deposit. But rather what usually people think is they want to have fun or either target to hit bigger multipliers.
Market volatility will also not affect gamblers because every time they deposit it, they immediately play gambling, maybe until it runs out, and even if they manage to multiply they will definitely withdraw it immediately.
We see how market collapsed from the past and we able to see that lots of reputable casino survive. So that means price of bitcoin or any other coins is not big deal for gamblers.
I've never seen a casino go bankrupt due to a market collapse, they still have huge revenues because gamblers are there all the time.