Lol, he doesn't have the courage to do the one thing that will remove any doubt about him, but has enough courage to announce to the public that he's a coward and a broken man and likely a fraud on a planetary scale...

At this point his mental health is clearly not good. If he really believes what he writes, he has delusions on a clinical scale which should be addressed before he does something he might regret. If he doesn't believe it, he is a consummate fraudster, a danger to the community, and should probably go to jail.