Most of the US dollars that exist are already digital -- numbers in a bank account, only some of which is backed by actual dollar bills. It is trivially easy to use them to pay for things or transfer them to other accounts, and they can easily be converted to/from paper money in reasonable amounts.
What we have now is fine. I don't see any benefit to making our existing currencies more "digital" than they are.
Most of the US dollars that exist are already digital -- numbers in a bank account, only some of which is backed by actual dollar bills. It is trivially easy to use them to pay for things or transfer them to other accounts, and they can easily be converted to/from paper money in reasonable amounts.
What we have now is fine. I don't see any benefit to making our existing currencies more "digital" than they are.