this time I can't understand where is the bad news behind this big dump 
Bans, regulations and massive FUDs about those speculations that are useless makes the price goes wrong. probably some big whale just empty their big wallet?
There's a possibility that some big whales initiated to sell some of their bitcoins and took their holiday with nice profit. And that was followed by those people that are feeling FOMO.who knows but right now from a bigger value over 19k on coinbase we are touching a strong defeat in 2018
Strong defeat? No but a strong correction. in 2018