hi to all users.  i just want to clarify  about  the uses and differences of  these three (BTC Address sign message, PGP, GPG)

Base on my research

BTC address sign message -  proving that your the owner of a specific btc address with using  your private key to generate a signature. only way to recover acc here if its hack by providing a evidence that your btc address sign message is hook to that acc. a way to do it is provide an evidence that you already stake you btc address to one of the thread here and other user quoted it  for future evidence.

PGP (Pretty Good Privacy) -  preventing other people  to use your identity to have a transaction or dealing with confidential information. more secure privacy   when in term of conversations, emails by providing a encrypted message and the only one who can decrypt it is the owner of the pgp public key, cause his the only one has the private key. also you can do a sign message in pgp.  

GPG (GNU Privacy Guard) -  a GNU project  and the modern version of pgp.

Please correct me if  im wrong or i missed some info. please dont bother to make a post here at this thread  for me and the other user  know additional info.  Thank you in advance.