I see no foolishness here, and we should weigh the situation carefully before passing judgment. It mustn't be Bitcoin all the time before countries can be progressive, and they have gained enough holding this stash for this long. Something must pay for the budget and government obligations, especially this time that the UK is now preparing for unplanned self-militarisation. This is actually free money. Besides, the UK still has investments all over, so what?
Then you don't understand Bitcoin's economics or the problems of the UK. This is complete foolishness and utter stupidity. Instead of fixing the government waste and inefficiency they are selling the best asset in existence. Do you know who was also not foolish? Bulgaria being stupid sold all of its BTC and took IMF loans afterwards. Instead they could have paid back their whole national debt if they had kept it.
https://cointelegraph.com/news/bulgaria-bitcoin-sale-could-have-erased-national-debt