Part of the problem in this conversation is that several people have put forth their own ideas about how a "bitcoin card" might work.  Some of these ideas assume a "credit card" that allows you to take a bitcoin loan.  Some of these ideas assume a "wallet on a card" where the private keys are stored on the card and transactions are broadcast from the terminal to make payment directly from the bitcoins associated with those private keys. Some of these ideas assume a "bitcoin bank" where the card is a way to represent your account at the bank and the bank takes care of paying the merchant and debiting your account for you.

Several people have made assumptions about what was being discussed without paying attention to the details.  As such, this conversation is a bit of a mess at the moment.  A big part of that confusion is probably first due to the OP's choice of words:


It doesn't exactly explain if that "wallet number" is an account number representing your account at a bank, or a bitcoin address, or a bitcoin private key, or a loan authorization number.

The rest of the confusion is probably due to the OP's choice not to stick around and control the direction of the discussion correcting people who wander too far off from whatever it was that they intended.