Only a mine owner could make that kind of money back then (do the inflation adjustment). These were the people who controlled or owned the banks so mot sure why they would bury the money. Or why wasnt it converted into a less bulky and less weighty form. Even is you dug it back up how were you going to lift it out of the ground and transport without attracting a lot of attention. Good observations on the number of coins and the shear weight of a drum of coins - that's not being skeptical, that's being intelligent and logical. Some of these boards need a lot more of that type of thinking. Wishes, hopes and dreams are great, but usually not when money is involved. Believe me I see it in the stock market every day - buried treasure, Chinese pink sheet companies, early stage biotech, Internet ipos - diff pieces of paper, all the same hopes, dreams, greed and emotion.
The professional treasure hunters start with hardcore facts like shipping records, manifests, insurance claim records, etc. i know a bunch of "experts" will quickly disagree but them be the facts. Undertaking a real treasure hunt is hugely expensive and no serious educated investor will fund without a lot facts. The world is very BIG so without some sort of real facts on where it is you are looking for a needle in a haystack. In most cases it is not on rumor or legend or by accident - those are the ones where stories float around third or fourth hand and for some reason no proof is ever offered of finds (yes I know the excuse is always that people are keeping it very secret to escape the tax man) - mostly wishful thinking and urban legend IMO.
My opinion for what it's worth - and that's not much!
Best of luck to everyone.