銀 (Yin) refers to silver, a precious metal that has been used as a form of currency for centuries. Historically, silver coins were minted and circulated in various cultures, serving as a standard medium of exchange. Its value is derived from its rarity, durability, and the intrinsic properties that make it suitable for trade. In modern times, silver is still considered a valuable asset and is often traded in the form of bullion or coins. Many investors view silver as a hedge against inflation and economic uncertainty, similar to other precious metals like 金 (Gold). Its role in currency has diminished, but it remains significant in jewelry and industrial applications.