When the price was 100 - 100 USD, a lot of people wanted to sell, and the price went down.
But now, at 80 USD there is a lot of people that believe in bitcoin for whatsoever reasons and are willing to buy every bitcoins @60-80 USD, so the price will not probably go lower.
The same could have been said about BTC @ $100 though. I can't count how many times I read "cheap BTC" and "buying opportunity" every time the price dipped below $100 these past few weeks. Will there be some resistance to going as low as $60? Sure, but will that resistance break like it did for $100? Only time will tell. People are scared right now, and despite good news bearish indicators continue to pile up.
I myself tried to buy 10 BTC on Coinbase last night but apparently I have to wait for my test buy of 0.2 BTC @ ~$93 to clear on Monday. D'oh. Hopefully prices are flat until then.