Everybody knows central banks created btc.
You meant about the bitcoin being created by central bank. how is it possible? you are joking about that dude. Bitcoin can be a threat for centralized system but it's not for its entities who have been using the centralized system. do you know about the defi coin? it has made the centralized system became obsolete.
Bitcoin can be considered as a truly decentralized system that become a threat for centralized system.
No proof that bitcoin was created by any ABC government's agency here.
In any case though, I don't think that bitcoin could also be the trigger of a central bank collapse. It will not be a world currency. And I'm sure government will not allow it, specially US government. So it won't be a threat, but instead will just be a new options for average joe. And if ever players like those rich and wealthy goes full bitcoin, they still banking system, just saying.