If you have a bunch of old, unused or new gift cards lying around you can easily exchange them into Bitcoin (BTC) if you want. I recommend going to Paxful as you can exchange your BTC into any other payment method easily. They accept almost every type of gift card including iTunes, Amazon...
I would check out a marketplace such as Paxful where you can exchange your used or new gift cards into Bitcoin and then into any other payment method if you want.
Hey Rasmus, there are two other places you can go to buy and sell gift cards, 1. LocalBitcoins and 2. Paxful.
You can read more about it here: How To Buy Bitcoin With Gift Card - Exchange Used Gift Cards