If you run linux I can definitely recommend Kleopatra for pgp stuff. Its clipboard import/decrypt/validate functions are very handy.

The ones in electrum and bitcoin use secp256k1 curves so they are different to pgp, though you can add this curve to pgp it doesn't show in most interfaces and most installations of pgp can't handle it. I think it may be because it was only added to pgp recently so most versions are older than this change.

also, as people are pointing out, there are many apps that are doing this transparently and automatically. Protonmail messages are, if possible, encrypted and signed.