Except it already exists. It's called debit cards. 0.05% + 21 cents. Still has some consumer protections (it can do chargebacks), just not the overhead of rewards. Accepted everywhere.
Just take the word "cryptocurrency" out of whatever you're proposing and you'll see that it's just adding techno-sheen onto what will inevitably be just another centrally-mediated payment network.
Except it already exists. It's called debit cards. 0.05% + 21 cents. Still has some consumer protections (it can do chargebacks), just not the overhead of rewards. Accepted everywhere.
Just take the word "cryptocurrency" out of whatever you're proposing and you'll see that it's just adding techno-sheen onto what will inevitably be just another centrally-mediated payment network.