If you weren't inclined to sell at $19k, then you shouldn't be inclined to sell now.
Just buy more at intervals on the way down. You'll eventually be glad you did.
Or you can wait for a trend reversal, but you may be waiting a long time, and then when it turns you'll just be chasing it back up.
Who here doubts that Bitcoin will be at $50k by 2020? I don't.
50k by the end of 2018. This correction is just a simple mid 2013 type correction.