One who studies and/or collects coins and/or currencies.(noun)
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Use "numismatist" in a sentence
"Amon Carter was also a numismatist, and he acquired his 1804 silver dollar in 1950."
"I consider Julian a great numismatist and a friend, but he chose a course of action which we coin dealers KNOW has severe risks."
"At the sale, John Nelson Rowe, III, was the high bidder, acting on behalf of L.R. French, Jr., a Texas numismatist from Midland County, halfway between Fort Worth and El Paso."