No it's not going to happen since government hate the decentralized ability in many coins in crypto space today, it's one of the main reasons Central Banks are building their very own digital currencies but i bet people love making money which is why crypto coins will be more favourable over all
I don't think government hate cryptocurrency because there are already a lot of countries who accepts crypto like US, UK, japan, Australia, etc. The only reason why the government will not adopt cryptocurrency to replace fiat is they will support fiat currency no matter what because even it is not profitable, it is the material thing that we use in exchange for goods and services.