I'm looking for an optimale way to store some BTCs for long term.
the best way in my opinion is storing on an offline computer or a live Linux and encrypting everything to prevent access from a random person.
or printing a paper and laminating it to keep it for a longer time.
Being digital nomad, I dont have a proper place to store a paper wallet.
you don't need a strange place to hide your paper wallet. keep it the same place you keep your documents.
I'm quite afraid to lose passwords too, and I want to prevent robbery or a hardware failure (lose of my computer, smartphone, usb key, ...)
I was thinking of a multisig wallet to avoid robbery or to lose access to them in case I'm forgetting a password.
you should make multiple backups from your wallet and store it in two or three places so to reduce the failure chance .
What's my best option?
Thanks
also take a look at this project called cryptosteel, it can give you some good ideas at least.
https://bitcointalk.org/index.php?topic=977486.0