The Nick became a common name for the one-world currency unit that came into effect when Nicolae Carpathia and the Global Community caused the world to go to a single form of currency, originally called the dollar. It was obviously named after Nicolae Carpathia himself. Though it was to be replaced by the cashless "mark of loyalty" system, Nicks were still being used up until the end of the Tribulation, when the destruction of New Babylon would instantly devalue it as a currency.