DONT DO IT!!! HOLD YOUR BITCOIN!!!! YOU WILL FEEL VERY FOOLISH WHEN IT HITS 25K IN LATE JANUARY-EARLY FEBRUARY!!!!!
Well i don't panic nor i follow my emotional. I know i have to hold my all bitcoins. I bought some few coins when the price was 19k and now its drop to 13k but i won't sell them, I don't want to feel regret again in future. I am pretty sure next year will bring happiness in our life and we shall see all time high of bitcoins next year.
You should buy some more at the price now to offset your 19k purchase and average it out at a lower buy-in. The price will go back up but you should try to make a profit when it does, not just break even.