Keep it out of the banks, and the stock market. Buy tangible goods that you need now or in the future. Some ideas:
+ Quality bike (pedal) suitable for road and off road use
+ Guns, Living in CA does not restrict you from owning a gun. I suggest a 9mm or bigger handgun, pump shotgun, Ruger 10/22 for practice, service caliber rifle .223 or 7.62x39
+ Ammo for all your guns, heavy on .22LR since it might make good barter some day
+ Junk silver (pre 1964 quarters are 90% silver)
+ investment quality silver (maple leafs are nice)
+ Food, do you have a 3-6 month supply of everyday food in your house? Buy now and beat inflation....far better return than a CD!
+ Long term storage foods in buckets, #10 cans, etc.....3 month supply is a good idea
+ Quality outerwear, clothing, and footwear...think Patagonia and other top brands
+ Quality backpack and a good set of camping gear (sleep bag, mess kit, air mattress, water filter, etc)
+ Land that you can camp and grow things on.....check town auctions where they sell properties taken for taxes.....CA may be too expensive for that
+ Set of hand tools. Craftsman makes nice mechanics tools, dewalt makes good power tools.
+ Enough cash to pay your bills should some emergency hit you...perhaps enough to relocate quickly should you need to "get out of dodge"