I've always felt safe with a certain percentage of assets in "insurance". Gold and silver bullion in small denominations. Silver in what they call junk silver and gold in small 1/10 or 1/20 ounce gold coins. This is not for investment for some protection in case of complete calamity.
I would suggest the very first item that is missing from your diversification is six months worth of expenses in cash. It is much easier to sleep having that available.