If ever there were a business with dark clouds on the horizon, it should be printing paper currency, otherwise known as banknotes. In the United States the production of bills falls upon the U.S. Treasury’s Bureau of Engraving and Printing, but for much of the rest of the world— from Armenia and Peru to Thailand and Swaziland, money is actually printed by a handful of companies, dominant among them, Munich, Germany’s Giesecke & Devrient.