Is it possible that Epstein knew Satoshi Nakamoto? Maybe we could see at the remaining decrypted documents.
I doubt it, he was reaching out to people via email to try to get to know them so he can inject himself into the project to control it. Epstein had no clue what Bitcoin was.
Though he doesn’t programming bitcoin, he invest the groups at early years and has large influence on the block size problem. He must know a lot about bitcoin and get benefit from it
The market chose BTC Core be the bitcoin rather than BCH, at least for now. And the Core team is the successor of the bitcoin code, even if it contradicts Satoshi's Vision.