National Debt Visualized Against Mined Silver

Here's a fun article. Check out the last chart that shows the U.S. national debt visualized against all of the world's mined silver. I've seen numbers that are several times higher for total mined silver, but it's still a fraction of the debt.
http://www.visualcapitalist.com/visuali ... onal-debt/
http://www.visualcapitalist.com/visuali ... onal-debt/