In the 16th century, metal coins were in circulation in the British market  After a long time, people found that full-value coins could be used as well as mints of insufficient value, and the value of the currency (bad money) quickly spent out  As a result, bad money drove good money out of the market
Most of the best literature is widely available.
 This is the Gresham's law, a natural and social phenomenon of The best of the worst