It's extremely possible there could be no big crash this time around. All the people selling now expecting a 3rd crash so they can buy back in will be fucked. Most of the last crashes involved some bad news of sorts. Things tend to happen twice in bitcoin, but not a third time. Don't be surprised if all we get are mini crashes on the way up. It's a good way to take coins from the weak hands who don't know what they have.
What bad news happened before 9 April 2013 ?
a fair question. well gox getting dosd made a lot of people panic, and if enough people panic a crash becomes unstoppable.
As far as the bitcoin potential network 51% attack or Bitcoin's global acceptance as currency. Both issue's were plaguing Bitcoin's future uncertainty.
Add the anxiety that the primary trade venue was MTGox and that it was "tested" hit with a DDOS back in April 10th 2013.
However if you jump to Bitcoin Today.Since then the network jumped from 111,000 GH/s back in June 5th 2013 to over 3,657,378 GH/s November 5th 2013.
Add in that US banking institutions have taken steps to no longer support international wire transfers out of US.
Government institutions around the world recognizing that bitcoin is a measure of value (currency)
ATM's and even Debit Cards are being offered in Canada.
Germany has a great taxation policy to bolster adoption.
A future potential ETF in USA, enabling your grandparents to easily invest in bitcoin will only accelerate user adoption.
Finally less not forget that China has been positioning themselves as offering a new world currency for trade.
They are already trading outside of the Fed's Reach with Russia, Australia, Brazil, just to name a few.
Here is a good read,
http://www.zerohedge.com/news/2013-10-18/9-signs-china-making-move-against-us-dollar