If Bitcoin becomes the World wide standart currency, will the government try to control it like the Do with Fiat now?

Lets say we are 100 years in the future and everybody round the World uses bitcoin as their standart currency. Do you think the government will try to control and regulate Bitcoin? Bitcoin solves many Problems, but is there a way for governments to turn bitcoin into Fiat, like today? For example: Bitcoin solves centralized " money printing" by being scarce. Can't the government just implement Bitcoin Banks and buy a shit Ton of BTC and manipualate the supply of BTC by simply holding it and the bitcoin Banks can give out BTC loans with interest rates that are decided by the government based on the inflation that is based of the supply and demand of "circulating" BTC that is manipualate by the government. Do you understand me????? Apart of that the government could make New laws for Regulation, so that your wallet is like a Bank account and every wallet has to be registrated with your name and a whole buch of data, so they have more control over you (i think that KYC is only the first small step). They also can make new tax laws that are much more intense and so on. There are probably lots of more Things the government could Do to turn BTC into Fiat money like it is today. Please Tell me that i am completely wrong, these are just shower thoughts but i cannot disprove these thoughts myself. Thank you!! Edit: For these thoughts i assumed that the value of BTC is generally stable and almost all 21million BTCs are already mined and the whole World already uses btc so the demand procentually doesnt grow as Hard as it Does at the beginning of BTC.