Both I think. You use this as currency at the same time in casino. Remember that when you play in casino you have to pay in currency, si if the currency you are holding is bitcoin, you'll need to convert bitcoin for every chips in casino same as today convert fiat into chips.
What the OP says here is not a casino where you bet with bitcoin. Which on the basis of fact, the entire bitcoin market is like a casino, hard to predict and more wits. And of course, when we join, we can lose at any time.