The Roman mint operated in or near the temple of Juno Moneta from the third century BCE, and moneta came to mean mint and then money across the Romance languages and English. The derivation from monere, to warn, is standard; the Livian story of the Capitoline geese is the traditional explanation of the epithet, told by Livy of 390 BCE.
The goose story is the beloved part: geese sacred to Juno honked, the guards woke, the hill held, and the goddess got a title that ended up on every coin in Europe. Whether or not a single goose ever honked, the story tells you Rome wanted its money watched by a warner.
The observation circulated by word historians: the modern world named its money after an omen system and then built an entire civilization pretending money is mathematics. The word remembers that wealth was always read like a sign.
A warning goddess guards the word for wealth. Did Rome know something about money that the modern world keeps refusing to learn?