Why are gold prices more or less the inverse of the other commodities (including other metals)? Is it because it's used more as a portfolio hedge than a commercial good, whereas the other metals have more industrial applications?
It's also interesting to plot all these commodities (as well as cryptocurrencies) in terms of the S&P 500, which is rapidly becoming the true store of value. I think you'll find that their price is relatively constant in those terms, and it's the dollar that's been falling.