Choose your own currency

I was thinking if it will be a option to implant this into Curve

Let’s say my bank card in Curve have EURO as default currency, and i pay a bill in DKK every month, then i want this bill to be payed on the card in DKK without Curve changing it to EURO from DKK.
So maybe DKK can be added as a secondary Currency so if you pay something in DKK it will not convert. Or maybe some kind of list so if this shop/company take DKK from my Curve card it will not convert.
The reason for this is my bank card have a high interbank limit compared to Curve.

I hope it make sense