The greatest wealth you could have is what I like to call "self wealth". An investment in yourself is always a WINNING investment. This self wealth should not be limited to increasing one's knowledge, but also maintaining one's health, because without health wealth is meaningless. There are many stories throughout time of someone who has a vast amount of wealth, and wanting to trade it all for being healthy and with youth once again. Don't neglect this most valuable asset.
Beyond that you have cash, precious metals, tools, weapons/ammo, real estate, stocks, cryptocurrency, etc.
Diversify or risk suffering losses you cannot easily recover from.
