They're often valuable for vastly different reasons â like the World War II-era coins minted from atypical metals, or double-printed pennies â but each one is easy to miss if you're not paying attention. See also: Californian Couple Finds $10 Million Worth of Gold Coins in Tin Can.
A subsistence economy is a non-monetary economy which relies on natural resources to provide for basic needs, through hunting, gathering, and subsistence agriculture.
2. early in the history of the world or of humankind. 3. characteristic of early ages or of an early state of human development: primitive toolmaking. 4. Anthropol. a. of or indicating a people or society organized in bands or tribes and having a simple economy and technology.