What I do is use the virtual crypto wallet in Revolut. Keep money in BTC and when I want to buy something move the exact amount across to the FIAT currency acco

What I do is use the virtual crypto wallet in Revolut. Keep money in BTC and when I want to buy something move the exact amount across to the FIAT currency account and tap to pay. I keep a small float in FIAT so I only do this when it’s the cheaper option.