Even then the seed might be seized by the government if for example they will decide to outlaw crypto and will have a suspicion that this is a Bitcoin private key, and while they wouldn't take your coins if the encryption is strong, you might be locked out of your coins if it's the only copy. If you want to be even more safe and store coins in bank for decades, it would be better to first use steganography to hide the encrypted seed in some innocent files, like family photos, and then optionally encrypt the photos. So, in case something like what I described will happen, you'll have plausible deniability and might even avoid raising any suspicion.