That will be happened to most of the countries. Due to the financial crisis in Venezuela, almost 60% of their population is now heavily interested in cryptocurrency. And the same will happen in some country too. I'm expecting a huge crisis world wide before the mass adoption of the cryptocurrency.
Most country in the world want to change their paper money to digital money. If cryptocurrency regulated by government, i am believe cryptocurrency can dominate transaction because crypto already getting more popular. Its good investment and not just currency, bussiness will adopting blockchain technology