Markets are a rollercoaster and crypto ones even more, so all it takes is a few bad news suming with the comercial war between USA and China and all the fuss sorrowding it, to get people in a panic mood that they start selling everything, remenber that in a not so distant past it only took a couple off good news to put BTC on 20K, so its down now but it will be up again, as in the stock exchange we have to see it on the long term, in order to maximise our profit.