Most USD Coin casinos will make sure to have a quick way to cash out your money which is their strength. On average, you should have your funds with you in <1 hour. Sometimes, this process may take a bit longer as the casino is bound to be running some additional checks in the background, and that is okay.
Not only that, but withdrawal limits seldom apply to digital assets and USDC payment systems. What this means is that you can withdraw any amount to your digital wallet.