Yes, there are people who takes that risk in sending depositing money in their casino balance and leaving it there till whenever they are ready to play or gamble.
For me is the riskiest thing to do. I can't trust any casino keeping my money there without using it for a long time cause one can't tell what will happen next.
And that's a more reason why you need to use a trusted casino, because with a trusted casino, you have absolutely nothing to be scared about with your deposited money. Because any genuine crypto casino will definitely not touch your money no matter how long it stays in the casino account. But yet that doesn't mean you should start using a crypto casino like your wallet where you keep your Bitcoin, but moreover, if you were lucky to have won a huge sum of money, and you have withdrawn sum, then you can definitely keep the rest, knowing fully well that it will be safe.
It surprised me some time ago when I heard a guy said he saves his funds in his casino and sports bet account, then I was like how can someone take such risk to save his funds in his sport bet account maybe he trust the security of the site better that bank.
But sincerely it's not the safest place to store or Keep funds for security purposes.
Many don't care about the casino site they are using, they are only interested in using any casinos to get what they want.