You should sell your bitcoins and get out because of a couple of reasons.
First is that you apparently invested more than you could afford to lose, which is the worst thing you can do when it comes to investment specially in something as volatile and new as bitcoin.
Second is that you invested in bitcoin without doing proper research and trying to come up with some sort of understanding on your own so that you don't have to ask such basic question as wanting others predict the unpredictable. In other words you don't invest in bitcoin because you think tomorrow price isn't going to drop, you buy bitcoin because you see the long term potential of it or see the usefulness of the utilities it provides.