You know if you look back at the history of ALL the large crashes in BTC, they are all associated with a speculative bubble which is popped by some kind of service-interruption at Mt.Gox. To my knowledge this is the 3rd, the first was Nov 2010, the second July 2012 and now the third is April 2013. This seems to be following a pattern of occurring every 8 months. Which shows that the community has an appallingly short memory.
Which is much better than having an appallingly scrambled memory, as I only recall there ever being a major crash back in July/June 2011, and of course now April 2013. There was certainly no crash throughout 2012, as I waited through most of the latter part of it for a correction that I felt would come, but never did.