I have a UK account in GBP & I've recently received a payment in USD, which reflects as a second USD balance. If I make a purchase online from a website that charges USD can I use my secondary USD balance? If there's no built in way of doing this, I assume I could change the USD currency to my primary before I make such purchases (& then revert back to GBP after), but are there any limits as to how many times &/or what the delay will be in switching back? Thanks.
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