We should all be able to use cryptocurrency within the open, free market.
It is my opiniom that cryptocurrency should never be used as a form of currency issued by the federal government of the United States of America as a standard because it is unconstitutional.
Source : Article I, Section 8, Clause 5
To coin Money, regulate the Value thereof, and of foreign Coin, and fix the Standard of Weights and Measures
If the miner must be "permissioned", then it is not a public blockchain and therefore not a cryptocurrency. You have just defined a CBDC, which is essentially what Ripple is.