Will we see the Great Crash of 2013?

It is entirely possible.

Irrational exuberance in the stock market and high levels of bullish sentiment.
Unsustainable financial conditions and mountains of debts, throughout the world.
Recessionary conditions in much of the world are already apparent - Europe is to be quickly followed by America, China and Japan.

Huge crashes don't happen very often, so the odds are against it.
But all the conditions are there for one to happen.