If I found a pre-Columbian coin, I would only conclude that someone lost their lucky piece. When I was a child, I had several Roman and other coins; many of the coppers are still cheap. My grandfather, gave them to me because he believed I should know ancient history and legends. The coins depicted old rulers, and the reverse often had one of the gods, or some symbol important at the time.
Old coins depicting elephants, except for some from Asia, are hard to get now because they were popular with collectors.