Harmonization is what will enhance the existence of the cryptocurrency, this will only happen when government globally has a stack in the decision making for this to work out, thou crypto is still evolving and this might not happen soon.
For the future, it can happen using fiat and crypto together, where there are no more problems because fiat is a traditional payment while crypto functions digitally. People are welcome to choose which one to make payments.
Exactly, why make the fuss about it when you can use both? No need to eliminate one, thus it will bring more progress in the country. The fact that fiat will be here to stay for hundreds of decades while crypto as a young currency that will kill inflation.
Just make these two work and we might know, this could bring more grow in economy.