why this big drop in crypto?

[JEEPERS0029]

Hi! You probably didn't miss the day of 14/11/18 and for the moment the day of 15/11 also saw a very big fall of almost all the cryptomonnaie, small and big, it's very impressive! It's been a while since I've seen a fall like that and still on all the crypto at the same time! so I'm glad there are market fluctuations and other influences like that but I have to admit I'm not at all reassured!! so I have two questions;
-Do you know exactly what's going on to make this drop?
-And if so, what do you think it's going to be like this in the past?
Here I thank you and wish you all the best!🍀
Thank you, bye.