The document discusses 7 things you may not know about U.S. currency: 1) The dollar became the official currency in 1792 with the Mint Act; 2) Paper money was first issued in 1861 during the Civil War; 3) Banks lost the ability to print their own money in 1929; 4) The currency we use today started in 1913 with the Federal Reserve Act; 5) "In God We Trust" began appearing in 1957 for anti-communist reasons; 6) Around 40% of bills printed each year are $1 bills; 7) The largest bill ever printed was a $100,000 gold certificate in 1937 featuring Woodrow Wilson.