Copenhagen Cash is a term used to refer to the currency of Denmark, which is the Danish Krone. The Krone is abbreviated as 'DKK' and is also referred to as the Danish Krone, with five letters in its abbreviation. The Krone is the official currency of Denmark and is also used in the Faroe Islands and Greenland. Copenhagen Cash is a term used to refer to the Danish Krone, which is the official currency of Denmark.