The moment you see any government trying to officially adopt bitcoin you can be sure that they are going to try to manipulate it to their advantage, we know that politicians all around the world are corrupt and it doesn't matter what tool you give to them they are going to try to find a way to get their way with that tool, just look what happened to gold, one of the best forms of money that we have available was corrupted to the point that governments could create mistrust in it and they could introduce their fiat currencies with impunity.
This is of the reason why adoption from from government institution is slow. The government did not know how to control a decentralized blockchain for their own used and advantage. But once the government lays the ground for cryptocurrency, its easy for private institutions to follow suit since it becomes legal.
While they do not have any way in which they can take control of a decentralized currency like bitcoin, they could do the same that they did to gold, slowly they could begin to buy bitcoin and since people still think in the price of bitcoin against fiat they could print all the money that they want in order to get bitcoin, then once their currencies fail they could back them with bitcoin and after some time they could leave this new bitcoin standard and introduce their fiat again because now they will be one of the biggest holders of bitcoin around the world.