https://redd.it/4vhyak
U.S. military has made up currency before for troops so they wouldn’t spend money off base
That time the U.S. military made up a currency for troops so they wouldn't spend money off base. https://t.co/R8zSFo1TvM by @jp_koning pic.twitter.com/uXj7DbBYaa
— NPR's Planet Money (@planetmoney) April 19, 2017
http://www.businessinsider.com/dutch-10-year-yields-negative-first-time-2016-7
http://www.nytimes.com/1990/02/18/style/pastimes-coins.html