whether the cause of this is happening, is it something to do with the decision of the south korea government?
Yes ! I think so too . because of their decisions to ban the altcoins , of course bitcoins price will be affected too because somehoe they are connected. Bitcoin is not the only one that decreased sharply, altcoins also . Ive also heard some rumor that these days about the drop price of the bitcoin and altcoins, theyve called it BUY days.