2000 years of poor and homeless people looking for any metal they can sell as scrap.
That's why I don't buy the apprentice argument that always pops up in these discussions.
In this case you'd be excused for saying it's some sort of ritualistic object. Because rituals are important in people's lives, important enough to create and carry around metal and stone objects with you. And rituals pervade all of society.
I don't claim to know what it is, but I think it was either very important to some ritual, or very practical to some trade.