Could BC possibly be taken over by some government entity?
Could that entity then say “no one can buy or sell unless they us BC”?
And, by the way, you need this RFID in order to make any transactions...
No, though a country or power could implement their own version and require a mark or RFID to access the system.
IMO, as this relates to end times prophecy, it would likely be some remaining world power that rises from the ashes of a worldwide war. Probably a theocracy that lobs off heads for not submitting to their belief system. Sound familiar?