A new trend after bookcrossing (releasing books into the "wild" to be found by other people, often strangers) and geocaching : leaving unique coins for other people at interesting locations.

Over 1,000 coins have been distributed since April of 2000 at various sites in the United States, Canada (British Columbia), Brazil, Britain, Cuba, Israel, Japan, and Palestine. Within the United States, coins have been placed in Alabama, Arizona, California, Colorado, Connecticut, Delaware, Georgia, Hawaii, Illinois, Kansas, Kentucky, Maryland, Maine, Massachusetts, Michigan, Missouri, Nevada, New Jersey, New Hampshire, New Mexico, New York, North Carolina, Oregon, Pennsylvania, Rhode Island, South Carolina, Texas, Tennessee, Utah, Vermont, Virginia, Washington D.C., and Washington state.