What does this look like? Say Trump issues Treasury Bonds to buy Bitcoin, thus backing (partly) US Debt with Bitcoin. Why would you need to fork?
Discussion
Because they'll want more than 21 million and they'll want to prevent self custody at the protocol layer.
Larry at Blackrock has already hinted at breaking the 21M cap.
I don't think it'll happen, or that it's even possible for them to do this, but we need to keep vigilante.
Then they would be the ones forking and to a worse protocol at that.