It's impossible because banks and governments will do everything to stop cryptocurrencies from becoming more popular. I am surprised that countries which have economical problems haven't decided to switch completely to Bitcoin or create their own cryptocurrency. Smartphones and other devices are becoming more and more popular and could be used for storing crypto. It's time to ditch fiat.
Maybe the suggestion is good for the countries with centralized government but its hard to republic and democratic form of government because they should heard everyone involve before they make a decision. I believe banks have nothing to do with making laws about crypto but they can be the expert and suggest something against cryptocurrencies.
They should know that in other countries where cryprocurrency is legal their citizen are enjoying freelancing and online businesses that are hassle free to operate. This could be a good situation in an economy because it will give more people money and better quality of lives among themselves