They say money makes the world go 'round, but Wired contributing editor David Wolman contends that the days of paying cash are dwindling. Which begs the question, what will a world without paper money look like? Wolman eschews hard currency for a year, travels the globe to explore various perspectives on the bills and coins we both treasure and take for granted, and paints a riveting vision of what our wallets may one day hold.
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