If you bought at $1000, congrats, you got in on the ground floor (which was actually less than $1 but I doubt anybody here cares about that). If you bought at $10,000, cut your losses and soon. Progressively lower highs for over month bode extremely poorly. The long-term technical damage to the chart has made it screamingly clear that this is an asset bubble, and a real humdinger.
Even if you bought at $10,000, as long as this is money you don't actually need, you don't need to sell and cut your losses. There is another option, which is to lend your coins out on Poloniex. Your total stash in bitcoin will then accumulate, which lowers your average purchase price, and you can then simply wait for the market to turn. This is what loads of people did when bitcoin went into a bear market in 2014-15.
You only need to sell and crystallise your loss if you desperately need the money for something else.