I'd like to move some bitcoin off an exchange and into a paper wallet for long term storage, but looking for ways to backup the keys in case of theft/fire/stupidity.
My thought was to (on a new offline machine) create the wallets and put the keys in a text file, as well as print. Encrypt the text file with GPG and record the passphrase in my password manager and on the paper wallets themselves.
Is it reasonably secure to then copy and store that encrypted file on USB, Dropbox, email etc?