Perhaps one day with the current bitcoin advances, bitcoin digital currencies will be an international currency for all countries, and make it easier for every human to make transactions between countries when going to another country.
if it happens in the future it will certainly affect the paper money that exists around the world, whereas we know when the banknotes have a lot of history and symbolize the diversity of a country with other countries.
if that happens, surely the government will not remain silent on the matter, there will be an agreement between state governments to immediately close the bitcoin network to the world.
what will you do if you have a lot of bitcoin.
Well, first I will like to say that your post doesnt make any sense at all. Bitcoin can already be used for international transactions to any country of your choice. So for you to say that that will be in a one day makes no sense to me. Not every government is against the use of Bitcoin, there are some governments that supports the use of Bitcoin and there are some of them that are even into mining. I read a news about Russia opening up a huge Bitcoin mining farm, and Im very sure that is happening right now.