"We all use cash in our everyday life, but we don't use hundred-dollar bills. We're not using 500-euro notes. And yet these account for mountains of cash out there. I think they're being used in tax evasion and by criminals of all types."
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Source : "'The Curse Of Cash' Makes Case For A World Without Paper Money". "All Things Considered" with Robert Siegel, www.npr.org. September 1, 2016.
Source : Dr Paul Chappell, Dr, Paul K. Chappell (2013). “Peaceful Revolution: How We can Create the Future Needed for Humanity's Survival”, p.38, Easton Studio Press LLC