Its all arbitrage especially once the bots, algos, and HFT get into a trade. Volumes are almost meaningless because of the variety of trade manipulation techniques. If it is a currency crisis, then a better option for UK citizens that still have to pay their bills and debts in GBP may be to buy 5-yr USTs and try to pick up some positive yield and positive carry. Interestingly using BTC as a flowthrough vehicle may provide a cheaper alternative than traditional fx
eta: some light reading on how cyrpto trading volume may 'fake.' I dont think its fake as a much as manipulated and/or doublecounted: https://www.forbes.com/sites/javierpaz/2022/08/26/more-than-half-of-all-bitcoin-trades-are-fake/?sh=238975766681
eta: some light reading on how cyrpto trading volume may 'fake.' I dont think its fake as a much as manipulated and/or doublecounted: https://www.forbes.com/sites/javierpaz/2022/08/26/more-than-half-of-all-bitcoin-trades-are-fake/?sh=238975766681