I keep most of my stack buried in the cemetery, beneath a headstone that is known only by me.
That way, it will never be lost to fire or natural disaster, theft is extremely unlikely, and I will always have easy access to it, regardless of any Government action to sieze control of personal assets or safe-deposit box.
And if I am ever incarcerated, and my house is torn down by developers, my stash will still be where I left it, waiting for my return.
With this long-term storage plan - I am able to Rest In Peace !!