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.
The problem when that happens will be the same problem that they have right now, how are they going to do it? It is very easy to talk about dismantling the bitcoin network, but the difficult part is to actually do it, with so many nodes around the world they will have to destroy every single one of them in a single stroke and if they don't then they will leave open the possibility of more nodes emerging, and if bitcoin becomes as strong as you are implying people are going to oppose such measures, not only people like us but really powerful people that have invested in cryptocurrencies.