We have USDC / USDT.

It's FIATs, just the same. Just buy it these, with the exchange and then send to the casino. It's more safer than using a direct payment with your bank, we all know how the bank process. Slowly and take time + having some chance is getting stuck like "time transaction, and other"

Casino is also don't want to complicated themself, "FIATS-stuff" mostly are suitable on Landbase Casino (physical casino) not online while everything need fast.