According to my researches, the dump is due to the finex orderbook being closed for a while due to some technical issue.
I think price will rise again in few days if nothing bad happens with Bitfinex, otherwise we may get close to 100 depending on the gravity of situation.
I'm just waiting up on some money and I'll try to jump in at the bottom. We'll be seeing it drop a bit more. I wonder, is this price drop due to th block size debate (doubt it) or other socio-economic happenstance that is generally crashing stocks and oil prices? I'm glad to see bitcoin playing with the big boys, sometimes burning beside them. Bitcoin is a phoenix, reborn from its own ashes again and again. Just wait 600 days, we'll see we had nothing to worry about.