Ancient coins found in Mohenjo-daro what is origion of these coins

While surfing Facebook, the post came into my view about “Coins found at Mohenjo–daro”. Some of the pictures I shared here were downloaded from Facebook. These are attributes of Mr. “Shekh Javed Ali Sindhi”.  So, how did these coins end up in jars, mostly found in ancient mounds? That question came into my mind. But …