This year the US government (the IRS) declared that bitcoin is a commodity for tax purposes, not a currency.
If another country were to declare bitcoin their official national currency, would the IRS still be able to call bitcoin a commodity or would it be forced to relabel it a foreign currency?
As a general rule, any state can present for payment the national money of another state and this state must redeem its money at the expense of gold and foreign exchange reserves. In the event that any state declares bitcoin its national money, this will be impossible. National money has always been considered banknotes, which have all the requisites of money and certain obligations of this state. It is unlikely that this can happen with bitcoin. I do not think that he can become the national money of any state. National national money can still be equated with a national centralized crypto currency, but not the usual decentralized one.