I'm not worried, as it has become a tradition that btc price falls in january. Look at the data from the last few years, then you will notice that the price always fell in January.
By the end of February or the beginning of March the price has risen again. I think this year will be similar and prices rise again no later than at the end of March. I hope so anyway.
Yes bitcoin is unpredictable. It always surpasses our expectation about it but trust in the bitcoin. Its price will rise up again and it will be a great come back for the bitcoin. The bitcoin statistic in the past years shows that the bitcoin's price goes down during the first month of the year, actually between January to February but do not be worry, the bitcoin's price rise again when it hits march. The graph shows that this is a normal event so do not let yourself be shaken. By the end of February or the beginning of March the price has risen again. I think this year will be similar and prices rise again no later than at the end of March. I hope so anyway.