My GPG keys are protected by a passphrase and that has, so far, deemed enough subjective security in order to allow me to rather liberally store copies of the k

My GPG keys are protected by a passphrase and that has, so far, deemed enough subjective security in order to allow me to rather liberally store copies of the keys as backups on computers and servers I use. It may depend on your personal security requirements whether that is not enough.