In other countries, such as Japan and Switzerland, cryptocurrency adoption has been received more openly. They have issued clear regulations to facilitate the growth and development of the cryptocurrency market in their countries and there are also countries that prohibit or restrict cryptocurrencies, such as China which has banned exchange activities and Initial Coin Offerings (ICOs).
However, when viewed as a whole, government actions against cryptocurrencies are still very diverse. The sustainability and future of cryptocurrencies is greatly influenced by how governments and markets can strike the right balance between necessary regulation and supporting market innovation and growth.
It's like a competition. The countries who adopt crypto/Blockchain tech first will be the ones ahead of the others. Crypto/Blockchain tech has become too big to fail and can't be avoided by mainstream governments. Even China considered turning Hong Kong into the next crypto hub. I think Russia will change its mind soon, especially when its economy is crippling because of the sanctions. We might live in a future where every country will accept crypto/Blockchain tech with open arms as long as taxes are paid in return. At least, that's the dream every crypto enthusiast has.
The industry must work together with mainstream governments to ensure a sustainable growth for both parties. With how things have been progressing lately (despite the US taking an aggressive approach towards crypto/Blockchain tech), I'm confident crypto will live alongside Fiat currencies for generations. Just my thoughts
Yes, all those big super nations will adjust on how they will work with crypto, with the emerging growth of people who are now willing to take the risk and step into investing with this channel, I see that even those big nations will have no choice but to try not to suppress but find ways to make sure that they will have a good advantages and make a good use of this market.
They need to adjust and let the technology continue to develop. We will continue to see crypto working alongside with fiat currencies just like what you said.