I read somewhere that this drop of BTC is due to BTC futures options expiry at 26.02. so if this was the reason and if price does not drop in 30-40k range and cause too much fear, we should see better days for overall crypto since this weekend... Just an opinion and some hope, not advice:)
How futures' expiration act in these cases?
Some are guessing(?) that the drop was planned to cause some panic and then take the advantage with selling as short ..
https://www.cityam.com/bitcoin-price-crashed-here-is-what-comes-next/