Visa is proposing a new "Common Credit Card" product that would combine all of a person's Visa credit cards from different banks onto one card. The card could be used to make payments with funds drawn from any of the user's linked bank accounts. Visa aims to make payments more convenient for customers and increase sales as some users are shifting to debit cards over credit cards. The concept was tested with potential customers and received positive feedback about increased security and accessibility, though some expressed concerns about acceptance and complexity.