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Historically, people have used everything from seashells to bottle caps as money, but arguably the most enduring form of money is gold. Why?

People settled on gold thanks to three key features: rarity, durability, and divisibility. These features made gold useful as a method for storing and exchanging value. Thanks to gold’s utility in this regard, the gold 'network' grew over time until gold became almost universally accepted as having value. For hundreds of years, gold was the primary unit of account and reserve currency in much of the world. Recently, the US dollar has largely replaced gold, although gold does continue to have value.