I think some regulations that china made affects bitcoin's price big time. China mostly has the biggest market supply and had the biggest contributions in market cycles all over the world. Just as a wise man said " Goods in the market are original, the others are made in china ".
Chinese dominance over Bitcoin price is not that high right now so current dump might be fueled only by south korean bull shit backed by south Korean whales and bankers.
There are many newbie investors who are just speculators in Bitcoin so they will panic even at very small bad news like this and start to sell all they have.