Divyaditya Shrivastava is the CEO and founder of Paladin. To the uninitiated, a challenge coin is just a disc of metal. It could be attractive, perhaps weighty. It's something you might find in a ...

Members of the U.S. military have long had a tradition of giving or exchanging “challenge coins.” The medallions have no monetary value; they come in various shapes and sizes, but most are about the ...