What do you call a person who collects money on a bus?
a "numismatist"American Heritage Dictionary definition:nu·mis·mat·ics (nōō'mĭz-māt'ĭks, -mĭs-, nyōō'-) Pronunciation Keyn. (used with a sing. verb) The study or collection of money, coins, and often medals. nu·mis'ma·tist(nōō-mĭz'mə-tĭst, -mĭs'-, nyōō-) n.