Not sure how soon it will happen but everyone thinks BTC can down to $2k at the moment.
I think the end of worlcup 2018. BTC will be down to $ 2k.
BTC prices may not fall as low as $ 2k or $ 4k, if $ 5.5k is possible, because $ 5.5k is the stable price of bitcoin.
The people selling now, sell because they think it will go lower. This is panic. Although I think that the road to 4k is open. But 2k is doubtful.
Everything is fine if you want to sell it, provided that you still get profit from the sale, if not you should HOLD.