Because of the China and Korea ban, created fear and there seems to be many weakhands. After seeing the bullish market last month, maybe a lot of new people get involved in crypto market, the inexperience lead to panic sell. Don't worry, the price will be back soon.

Bloodbath like this is very common in the crypto world, you can make huge profits during this time by buying cheap coins, or play it safe: just HODL>