Well, I do think this is a kind of trend which is kinda normal when the digital coin market appear to be really healthy, stable and everything is gaining very well. After a day or two, BTC's and other Alts suddenly increase the price for no reason at all, without updates, news etc. Traders often called this activity, Whaling. Then you will see a lot of people jumping in (buying), as they want to ride the wave of this sudden increase. Once the coin hit or approaches the target mark, everyone will suspect that it will pretty soon crash, you will see a lot of news or trending stores regarding the incoming price crash. Once those stories causes fear, a crash will totally happen. People will start selling (traders often called this activity Dumping) their stored or hold coins as they fear of the expect decrease of its market price value.