Hold and possibly invest more could be the best options in this situation. With time the price would bounce back and those that invest now and hold will have good story to tell. We should be patient and continue to hold and invest more in bitcoin and other coin.
Bitcoin is the best choice that no one can ever put doubt on it, if today price is down then surely it will bounce back so everything will come to the track once again, have patience but try to learn from the market, price will be high once again just wait until the price recovers, holding is actually success in trading and panic selling is full of lose.