I see nothing that will stop it.
you know its a Ponzi when the shorts go long.
so ride the wave to $400 and then reconsider. Black swan event....what would it be? Howabout obamacare in jan 2014 when the only people paying premiums are those with pre-existing conditions. Black swan event coming up.
Why step in front of a freight train, the moment the market turns, get out!