Whether the Bitcoin price rises or falls, I believe casinos can still make a lot of money. However, when the Bitcoin price drops, they might actually make more money. Those who know about this might see it as an opportunity to increase their own profits, but there's still no guarantee of winning. Furthermore, not everyone is aware of this, so not everyone gambles through Bitcoin. Even those who do know about it aren't necessarily interested in doing so even when the Bitcoin price is falling.