Let us assume that a country wants to make Bitcoin it's legal currency. Or it wants to pass a law specifically about Bitcoin.

How could it legally be defined?

Could they just say "Our country recognizes the following currencies to be legal forms of exchange , bitcoin, ..."

With its decentralized nature and evolving blockchain, would there not be a requirement to have some sort of central authority which would continue to update the definition of Bitcoin? What if there is a branch off due to a code change, something is added and some miners accept it and some do not. What source of the code would be considered the "official" source? etc..


So far countries have been able to just group "cryptocurrencies or digital currencies" into one group which covers many things. But at some point it will probably be necessary to legally define Bitcoin. Not just as a country's currency but via contract disputes, payment agreements, property laws, etc...