It's possible using Electrum's console.
But it's not necessary to use your private key for decryption.
Thank you. I will try later.
But this way it is far less secure... it would be good to encrypt with public key and decrypt with the private key, like PGP.
This will probably answer your question, in short it is possible, but not recommended as it encourages address reuse, could have privacy implications and could have interactions between protocols using the same key pairs.
Thank you.
The person who answered said that using systems that were actually designed for encryption is better... he is right ofc, but maybe an upgrade in bitcoin protocol in the future?
It would be nice to see one day people using bitcoin protocol to encrypt messages, it could be easily done by users and would protect our privacy in our emails and other means of communication.
I don't see a problem with address re use here. You could use some addresses just for messaging, no big deal IMO.