A miner dropping out, seriously?  No, the obvious reason for the crash in price is that the recent hack at Bitstamp panicked a lot of people, who started selling.  I can't say that I blame them, really.  I'm starting to wonder if I'm dumb for not selling earlier, but I always knew it was a gamble and high risk investment buying bitcoins, and I sleep soundly at night even with my paper loss.  I'm still hopeful that the price will go up again eventually.