Why do they call dollars bucks?

Answer 1

In early America, before money was widely spread, goods were traded in exchange for other goods. A common need was 'buck skin' for clothing so that a 'buck' became a form of currency as a unit of value for anything else. The original explanation may have come from the American Indian who traded with 'goods' as a form of currency, including the Buckskin.

Answer 2

The term "buck" for dollars is believed to have originated during the colonial era. Deer hides were commonly used as a form of currency, with each hide being referred to as a "buck." Over time, the term "buck" became synonymous with dollars.