Athens Debases Its Coinage
Broke and losing the war after the Sicilian disaster, Athens melted down the gold statues of victory on the Acropolis and issued bronze coins with a thin silver plating, declaring them equal to the silver drachma that had been the trusted currency of the Aegean. Athenians hoarded the real coins and spent the fakes. A comedy staged that year has a chorus complain that the city treats its money the way it treats its politicians — preferring the debased new ones to the sound old ones. The good money vanished from circulation within a year.
A money's intrinsic or backed value is diluted to fund obligations; confidence in it erodes, often into inflation.