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.