I would agree that central banks want to replace the form of the existing monetary paradigm with a digital, trackable, traceable currency and use a similar model as the Chinese social credit system to basically controll who can buy and sell. The thing is, BTC is not that, they can try to attack BTC with a 51% attack, or create laws to make it illegal after developers create infrastructure surrounding digital currency, but it remains to be seen if they will be successful. They would not create a distributed ledger system that has the same properties as BTC, otherwise they would just use BTC. They wish to lock in control and BTC is our best current hope of removing that control from them, as they have proven they are incapable of responsible monetary management and stewardship