I just read a post now when the op said bitcoin is never going to go below $5000 but to me we can not really predict this market and the best thing to do is, knowing how volatile this market is and buying as much as you could when it is down and do likewise when it up.
Remember that since yesterday bitcoin has lose over $750 dollars and this is a huge loses in the face of this bearish market. If you are still holding it is best to keep holding until you can sell above your purchase price as bitcoin will still recover in future.
If you have risked capital you can also buy now that bitcoin is extremely cheap.