That should be by choice, running a casino company in the Beer market is not a compulsory act. But it is by choice. And remember bitcoin will still rise again. So you don't have to discourage gamblers in matters like this. Bitcoin has not devalue itself. 1 BTC is still like that but the only thing that has been changed is the exchange with Fiat.
lol bitcoin growth has nothing to do with gambling running in crash because remember that there are lot of coins that is accepted in crypto gambling site nowadays and not just bitcoin.
though the effect might be different but still there are several choices gamblers can use in this matter,
but indeed that it is depend on how they wanted to push either in bear or bull.