This requires a crystal ball, which sadly I don't have.
Whatever systems are eventually established will obviously have their use cases. I'm sure some of them will include the ability to make small transactions digitally. Personally, I find digital transactions for brick and mortar shopping counter productive and unpleasant, and so I will push to continue cash (likely backed by gold) for that purpose. But I know others feel differently, so I'm sure there will be systems that are created for it.
For purchases online, there are already options to pay in crypto currencies like Bitcoin, which can function similarly to a debit card. I would expect these will survive in some form.
This requires a crystal ball, which sadly I don't have.
Whatever systems are eventually established will obviously have their use cases. I'm sure some of them will include the ability to make small transactions digitally. Personally, I find digital transactions for brick and mortar shopping counter productive and unpleasant, and so I will push to continue cash (likely backed by gold) for that purpose. But I know others feel differently, so I'm sure there will be systems that are created for it.
For purchases online, there are already options to pay in crypto currencies like Bitcoin, which can function similarly to a debit card. I would expect these will survive in some form.