So I think behaviors like the German government selling Bitcoin will occur frequently in the future. Maybe the US government and the British government will continuously follow up to sell and suppress Bitcoin so as to make the Bitcoin circle unable to survive. For example, miners cannot survive. A large number of investors suffer losses, and Bitcoin is completely reduced to a tool for speculation and gambling instead of a real world currency.
How often will governments sell bitcoin when they only hold a fixed amount of bitcoin and cannot create more bitcoin like they can with fiat? Once they sell all of their bitcoin holdings, we will no longer be affected by them.
If what you're talking about is the government trying to make it impossible for bitcoin to become a currency, then I don't think they need to plan to crack down on bitcoin. They simply don't make it legal tender then it will never become legal currency, and that's what they've already done. They have legalized it but they only allow us to use bitcoin as a commodity (asset). And I also think that in the future they will not change that decision, they will never let bitcoin become a currency because as you said, they will lose control over us if bitcoin is used as a currency to replace fiat.