Whale's action. 
When everyone thinks the prices of crypto will go up because of ethereum hardfork they using this situation and dipping the cryptos that is why we call it si most unpredictable market.
well, these occasional doubts as to be in the market. they play a scenario aimed at their interests and for little people certainly can't do much other than just go with the flow of the game the existing Whales in crypto. against this scenario will only cause harm to ourselves let alone when hardofrk is getting closer.When everyone thinks the prices of crypto will go up because of ethereum hardfork they using this situation and dipping the cryptos that is why we call it si most unpredictable market.