Gavin is pragmatic and respects his limitations because he values his accomplishments more than his appraisal of his knowledge, i.e. he doesn't have insecurities or is more balanced. Greg is idealistic and doesn't respect his limitations because he values his appraisal of his knowledge more than his accomplishments, i.e. he has some insecurities or is less balanced.

You definitely want Greg to leave your coin and go to the competitor's coin where he can pretty well muck it up. CoinJoin is a great example of that.

Don't get me wrong, Greg is smarter and more knowledgeable than me when it comes to math and crypto. He is a guy you'd love to have for his smarts, but you'd need to be very careful not to hand him the keys. Perhaps you could bring him around with some social engineering. I found that by being more careful about the way I interacted with him in ways that painted his ego well, he was more accommodating. I doubt he wants to leave Bitcoin, because he wouldn't have the same prominence with any other direction. Thus is he ripe to be accommodating.