Imagine we had some kind of credit card that was linked to VTI (and the market didn't have these silly business hours). When you charge the card, it automatica

Imagine we had some kind of credit card that was linked to VTI (and the market didn't have these silly business hours). When you charge the card, it automatically sells shares to fund your purchase. Would you use that card? How does it differ from the scenario you described for Bitcoin?