This is the best feature of Bitcasino. It supports instant deposit feature which credit your deposit once its registered as unconfirmed in the blockchain. The only thing you need to watch out is the possibility to cancel your deposit because your deposit transaction will never be completed on your casino wallet transaction history.
You can bet even when your deposit has yet been confirmed on-chain by miners and it is great advantage from Bitcasino.io to their users.
However, you will be allowed to withdraw if your deposit has confirmation on Bitcoin blockchain. Even you lose or win big, you need confirmation to get approval for your withdrawal.