value

価値　—　Phenomena

How much a thing is worth.

Aegina sea turtleBC 550–480 Knife moneyWarring States period Franc à cheval (the franc on horseback)1360

⚠ The value of a currency has at least three layers: its value as a material, its value as a denomination, and its value in that "everyone will accept it."

When these three align, nothing happens. When they diverge, history is made.