The Crypto.com USD Card is a prepaid card that works exclusively in Credit mode. This means that, when using it, it's important always to inform the merchant that the transaction will be processed as a credit payment. Transactions attempted as debit or through other modes will not be authorized.
However, it's worth noting that although it operates in credit mode, the Crypto.com Global Card is still a prepaid card — so there is no billing cycle, no revolving credit limit, and no option to pay in installments. Transactions will only be approved if there is a sufficient USD balance topped up onto the card.