Panic selling is the worst thing that you can do with your bitcoin investment.
This is really a newbie mistake. If you are even just a tad experienced with bitcoin you'll know that when everyone else is dumping, you buy. But don't buy in all your coins at once, buy it in sections. For example, set yourself a target of buying 1 BTC a day no matter what the price is for 10 days when the price is crashing.
I wouldn't be surprised though that if there were more to come. I'd say that btc will settle at around $2200 eventually after all the adjustments. I just don't think that we will see a sub-$2000 bitcoin price for a long while, possibly in 1-2 years.
Panic selling is not all a newbie mistake. Most of the users here are holders of small Volume of bitcoin. So when the price moves unexpected suddenly users get the fear of missing out the ATH. This will surely make the users go for a selling. This will be used by the large scale investors to profit big.