The user stats are a poor indication though (no lack of dormant accounts and sockpuppets here), try to get a better excuse next time OP, like "gpg is hard".
Sorry for you that GPG is hard. Probably you can find introduction guide to help you understand.
We have used PGP/GPG for long years before Bitcoin paper was written. Many people who are not very technical or have not been technical for long time think GPG was born from Bitcoin but such is a mistake. The Bitcoin people using GPG are like a drop of water in the ocean of PGP/GPG users.