Believe you me no matter how advanced bitcoin decentralisation might look or sound the government will never risk giving their citizens full control of their assets. The always want to be in charge and has long has they have this limitation of full custody stricter laws regarding Bitcoin usage might spring up. Technology is advancing
This is the truth, sadly, no matter whether we have tried Bitcoin to be decentralized, the government will make certain centralization in some ways to reach it. They even make regulations about Bitcoin and other cryptocurrencies, trying to control them in some ways as they can. Although basically, they may not be able to control all access to Bitcoin because they are decentralized and can be gained from other decentralized ways, the government will always limit the decentralization.
We have found so many exchanges that must be centralized, government tries to control the exchanges themselves or other regulations or they will be banned. But on the other hand, we can also still be able to pass it in certain ways like decentralized P2P, although this is also risky to take.