Like my normal dollar based credit cards that allow foreign transactions and have no foreign transactions fees...thr processor converts thr currency to dollars for me and puts it on my statement.

Nothing crypto specifically solves as a user.

Agreed, exactly like crypto or a money changer. Nothing specifically solved as a user.

> Nothing specifically solved

Besides permissionless transactions? Does your credit card offer those?

Do you pay monthly fees for the privilege of not paying fees on foreign transactions? I do :(

Which single currency satisfies the GP's description?

I want my transactions to have permissions. That's a feature of the system. What happens if someone fraudulent spent my crypto?

No fees on any credit cards I keep, except 1 which was waived this year when i called to change it to a free card.

So they do charge fees (for you and the seller, also a user). Sounds like a problem with the company you require permission from.

If irreversible transactions worry you, use an intermediary; the way you already use credit instead of cash (which requires no permissions).

Any single currency?