Why do you have to do anything at all with the pound, when you are going to replace it?
This think tank is basically saying that Bitcoin is so far and away superior to fiat money, that the pound has now become a
liability for the British government - a grenade waiting to go off - and it's therefore best for the nation to sell it to the highest bidder before it implodes and takes their whole economy down with it. It's a wise analysis and a prescient call to action.
On the second graph above, draw lines in your mind where World War 1 and World War 2 are.
Consider the implications, and then
watch this talk to bring it all together.