> It's easy to use your CC account to buy anything you can with cash. Every month almost every cardholder gets these checks in the mail which can be used to pay and common debt. If you can't deposit one into your checking account (the simplest solution), overpay one your other cards with a zero balance and next month request the issuer send you a check for the overage. Voila, cash to buy cryptocurrencies.
You DO realize how much this sounds like a pitch from those credit card junk mails I throw in the trash?