I think if they were new they wouldn't pay much attention to the ups and downs of the price, because basically they would focus on the stakes and not on the price on bitcoin. But indeed, the decline in the price of bitcoin will not affect the overall bet because every gambler and player certainly has its own way and calculation for them to hold, withdraw and deposit. So far the price of bitcoin has experienced a lot of decline but in fact there are not many gamblers who complain about it and also, not many of the developers are bankrupt, because more of them survive and continue to grow over time.
The impact on the casinos may not be, it just applies to the gamblers themselves. Let's say a gambler deposits Bitcoin from buying at a low price or withdraws it from a wallet when buying at a high price. So we can consider when we want to bet using Bitcoin from the results of purchases in a bear market the impact will not be felt. As for gamblers who deposit Bitcoin from high-priced purchases, the solution is better to use altcoins.