Looking at the relative value between silver and gold the ratio per oz is 60 to 1. This is historically low, but the prevalence of silver in comparison to gold in the earth's crust is measured around 17.5 to 1.

This could lead someone to believe that silver is tremendously undervalued, but a more accurate measurement would be the market cap, not the current price.

The market cap ratio between gold and silver is currently around 7.5, meaning that if the figures are correct silver is overvalued by about x2 given their relative scarcity. There are other factors, but from an investment standpoint this is a sound way to look at the two imo.

I would not have learned any of this without understanding Bitcoin, which of course I expect to outperform both gold and silver.