Change your display currency in your Account Settings.
What is 'display currency'?
The display currency is the currency set on your wishes. It's also the currency your gifters will pay in unless they manually override your wishlist currency by changing their checkout currency setting.
Display currency is different from payout currency. Payout currency is the currency your payout processor pays you out in.
Setting your display currency to USD may help reduce payout losses due to conversions.