I am questioning if it is attainable to make use of the Bitcoin private and non-private keys (normally used for signing) for textual content encryption. That is an instance in nodeJs:

import pkg from 'bitcore-lib'

const { PrivateKey, Networks } = pkg
const privateKey = new PrivateKey(Networks['livenet'])
const myObject = {
    privateKey: privateKey,
    P2PKHAddress: privateKey.toAddress(),
    publicKey: privateKey.toPublicKey(),
    wif: privateKey.toWIF()
}

It’s attainable to make use of publicKey to encrypt a message and decrypt with privateKey?

const encryptedText = encrypt('Hiya', publicKey)
const decryptedText = decrypt(encryptedText, privateKey)

assert decryptedText === 'Hiya'