Or, as history shows, will see a lot of Nimitz class aircraft carriers suddenly moving in its direction. But first one needs to take one for the team, then critical mass will follow, but we're few years from that
I seriously doubt it if China, Russia or EU do it.
Then again, if it is a country which starts with "I" and ends with "n" or another cough-NK-cough, then, sure, it's quite possible.
EU has the brrrrr printer, China is oppressing its citizens and fighting the capital outflow, Russia has the most to gain but anything that can be perceived as challenging current status quo would be fought against, so don't see any of them willingly accepting BTC anytime soon. It has to start with a small nation dipping their toe in first, floods always start with a drip first