Wouldn’t be very difficult to setup if there was demand for it. Companies that accept bitcoin immediately convert to USD. Regardless, currencies don’t fluctuate 30% in price nearly daily. The single biggest definition of a currency is a stable store of value.
The underlying technology of blockchain currencies is where the real revolution is. It would allow completely transparent government accounting, auditable by anyone, for instance.
Can you imagine the revolution in government if we could track every single penny they spent?
Which is exactly why it will never happen.