This is definitely far from reality. Why would a government end up centralizing bitcoin? Knowing bitcoin is decentralized, so it can never be fully controlled by the government or any group or entity. But once its centralized, the government will all have the access on it. But take an example from China, they have created digital yuan which is definitely centralized in the first place, so they started banning bitcoin so that its citizens will stop using it and focus on their own digital currency. Maybe that will also be the case of other countries' government and they would not waste time on adopting bitcoin anymore.