I honestly don't see a problem - nothing has changed really. Bitcoin isn't supposed to be a get-rich-quick scheme. The system behind Bitcoin is as strong as ever - we have more exchanges, more merchants, more hashing power, more users, etc. than we had a month ago.
I don't see why anybody would sell all his/her Bitcoins now - those who believe in the unique qualities of Bitcoin obviously won't sell because they haven't changed a bit. People who are just here for some quick buck could hardly have chosen a worse time to sell either...
My guess is it's mostly speculators which sell low but hope to buy back again even lower.
Anyway - lower prices also lower the barrier of entry for new people so go and sell away all you like
