You haven't lost anything until you decide to sell at a loss...
The only thing that would make it worth selling at a loss would be an incoming and immediate dead-end...
Bitcoin is more alive today than ever in it's life. Tons of new innovation is right around the corner. It's been recognized for usefulness outside that of "just a currency alone" by legislators, economists, and journalists.
To sell now is foolish. I don't think we've even begun to see where this can take us.
There are individuals who by themselves own enough Bitcoin to crash every single exchange simultaneously. The conversion rate of Bitcoin to various fiat currencies across a hand full of highly manipulated exchanges is actually about the least important factor of Bitcoin...
For those who sell at a loss; it's their own choice. I believe Bitcoin is going to revolutionize several sectors of world finance. When the price goes down, I buy and hold... When the price goes up; I buy and hold...
It's coming people... Just a few more years to go...