As Bitcoin transactions are processed through the Bitcoin blockchain, each transaction has a bit different transaction time. On average, Bitcoin transaction get's confirmed by the blockchain in 10-30 minutes. Some casinos require for example 6 network confirmations, which means that the transaction can take up to 90 minutes. If you have any issues with your transaction not appearing on the casino crypto wallet, you can always contact the casino customer support. If you want faster deposit times, you can always choose other crypto currencies with faster confirmation times.