If you owned shares in gold mines and got burned, it had nothing to do with the value of the gold itself. The price of gold has seen a steady upward trend over the past ~17 years at least (that's how long I've been looking at it, anyway).
"adjust for inflation" on a 300% increase? Are you looking at a different graph than I am? Perhaps I don't understand what I'm looking at. Could you walk me through your reasoning?
The giant saddle does seem to support the idea that gold is hard to value.
Then the next search phrase to look up is "inflation adjusted price of gold since 2011". It's not a pretty chart. I would not use the words "steady upward trend" to describe it. "Steady downward trend", maybe.