Bitcoin is a digital currency that circulates freely, without any control or supervision from banks, governments, or anyone else. In contrast, bitcoin relies solely on cryptography and software between computers.
what if the government closes or does not allow the exchange of Bitcoin or cryptocurrencies with the official currency in each country?
In your case you are suggesting that all 190+ countries would ban Bitcoin but as long as the miners keep going, people can always trade p2p and as long as one exchange allows fiat options, money will flow back and forth. what if the government closes or does not allow the exchange of Bitcoin or cryptocurrencies with the official currency in each country?