I personally don't bother too much just because if someone Google, 3 letter agency or even aliens will come up with a quantum computer satoshi's funds will be the last thing that we'll need to worry about.
Just think about all the "password protected" (encrypted) things that are out there, like: financial system servers , electricity servers, medical care servers, airplanes servers, nuclear missile codes. These are things much more valuable and important than 1M bitcoins.

Banks can freeze accounts, rewind, correct it.
But Bitcoin can't.