I am also confused about what OP was trying to say here
A token that's dedicated for gambling just like the usual tokens that the other casinos has. And we don't need it anymore since there's too many of cryptocurrencies to choose from and overall, we have bitcoin and for the altcoin accepting casinos, they can choose from thousands of it but most of them relies on the top and most popular.
I there are already cryptocurrencies that are been using in the gambling sites
Yes, like the projects that are coming out now. They are making their casino with the token that they are also using to fund their business.