Past performance does not guarantee future results
Taking advice from a*sshole gloating windbags doesn't "guarantee future results" either, specially when they've no idea who they're talking to.
Plenty people have been in and out of this market 100 times since the ATH. They've made money on the way down, on the way up, some have lost some have gained. Some decided to hold and don't give a sh*t what the price goes to for the next couple of years because they've got better things to do than to sit glued to a trading chart everyday.
Get a life.
P.S. This is for you...you might identify with it.
http://www.youtube.com/watch?v=U8Kum8OUTuk