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Per the U.S. Mint, the life span of a coin is 30 years:

     "A coin’s typical lifespan is 30 years. See https://www.gao.gov/assets/gao-19-300.pdf, page 6." 

For paper money, depending on denomination, 5.7 to 24 years. (https://www.federalreserve.gov/faqs/how-long-is-the-life-spa...)