If you want REAL portfolio diversity to protect against market volatility, you're going about this all wrong.
Your most valuable asset is not "gold" or "equity" or "invisible monies" or "land." The real money is in your BLOOD. If you're someone who has O blood, get yourself an industrial freezer, some Ziploc Freezer Bags with that slider and a gas powered generator and get yourself busy packing that up. If you are not O, get yourself on the tinder and find an uggo who fits the bill and seems susceptible to having a few melatonin slipped into the evening drink of their choice.
Guaranteed returns in literally all market conditions.