First, the population of the country that decides to implement cryptocurrencies as a new asset. They should be educated on how to use it because from the beginning it is long learning. The use of cryptocurrencies as we all know requires discipline and knowledge is the main thing to that adoption of the new asset to work and not cause disinterest.
The country should improve telecommunications systems throughout the urban territory. For the good and efficient use of the necessary equipment such as smartphones, Wifi among others. I believe that it will certainly bring more advantages than disadvantages if a good marketing study is carried out and that it has an excellent team of developers who create advanced technology financial products and services.
You are right that if all countries convert to cryptocurrency it will bring us many benefits Crypto has improved many popular before When our country's government learns about its use every country will support crypto. Technology will be developed and the economy of the country will be fed.
That will never happen. Governments will be having a problem if that ever happen. If they immediately convert, they will be having a lot of problems not just to the people that do not know it but also the supporting technologies to make that happen. Banks from the monetary system is still not ready, we will still run through mobile payments before we go to crypto currencies.