If we get to a place you’re describing where the government takes away the right to private property preventing us from exchanging Bitcoin for fiat, my point is that it won’t kill Bitcoin and it will still be accepted globally.

There are no central exchanges to buy cocaine. The government has made it illegal to buy/sell/own cocaine; however, I can still buy or sell cocaine using anything from cash, Rolexes, weapons, or anything else the two individuals involved deem as money.