Well you might be right there, but just think, are people going to stash as much hoards during normal times? During comfortable times people are going to keep their valuables, good things out in their homes, on their person. Then they experience something like a flood, famine or volcano erupting or mudslides, or fires and do not have time to hoard their valuables away. When time of crisis happens specifically wars then they don't want the invading parties, armies, thieves taking their stuff. Thus additional hoards are buried. Just like happen here in the US during the Revolutionary War, and Civil War, and wars anywhere for that matter. Just a thought.