You could back it up onto a few USB drives in an encrypted container perhaps as an alternative.
The problem with encrypted containers is that you can always forget or lose the encryption key(s).
Piece of paper for me.
The safest of all things that have been created.

If you put it in the internet it is not safe. You input it in a USB still not safe even if encrypted one.
I just got two copies that have been written in a paper. One is in my storage of important things and one is being held by my wife which I dont know where she keep it.