Penny debate in the United States
A debate has existed within the United States government and American society at large over whether the one-cent coin, the penny, should be eliminated as a unit of currency in the United States. The penny costs more to produce than the one cent it is worth, meaning the seigniorage is negative – the government loses money on every penny that is created.
Source: Wikipedia — Penny debate in the United States (CC BY-SA 4.0)