"I believe that banking institutions are more dangerous to our liberties than standing armies. If the American people ever allow private banks to control the issue of their currency, first by inflation, then by deflation, the banks and corporations that will grow up around the banks will deprive the people of all property until their children wake-up homeless on the continent their fathers conquered."
Thomas Jefferson 1802
It's the American spirit.
You can not trade US dollar for gold, but you can trade your smaller US dollar for a even smaller US dollar. To know more, watch clips from Zeitgeist.