How to become a millionaire in the coming crisis.

Buy a 40' container full of toilet paper.

Buy a 40' container full of rice that isn't full of bugs.
Buy a 40' container full of flour – also no bugs.
Buy a 40' container full of powdered milk/eggs/freeze-dried food.
Buy a 40' container full of good boots, shoes, socks and underwear.

or

Get a .50 and a hundred rounds of ammo and own everything.