Prints green bills that are worth a lot of merchandise in nearly every country in this world. If there's people alive 2000 years from now, this is one thing future humans will scratch their heads to understand about our time. "Do you mean, back then people worked their asses off and wrecked the planet to produce lots of things, just to exchange them for small slips of paper painted green elsewhere? WTF 20th-21th century people!"