for now they are still developing so you can only earn but in the near future you will be able to withdraw or use them to buy commodities online.
Also, you should check the price for their coins and see why i think this passive swift earning is a cool thing.

For example mine i joined about few months ago and earn 700 a week. i am now at 14,000 Swifts and i get an email reminder when they get to 700 Swifts to claim so that the timer can continue to award 100 every 24 hrs