Looking for potential support if BTC breaks down beneath the 40k level, which happens to coincide with previous support and the SMA(200). That should be strong support and with luck will be the end of the bleeding, but given the speed of the move, we have to be thinking about what may come next should the support fail.
The next recent support level was around $31,500, but that is relatively weak, so it appears likely that if the $40,000 level / SMA(200) is broken, the price could extend down to the $20,000 level where there has been strong resistance in the past.