Just like some have already mentioned, In this crypto market, everything and anything should be expected. You don't suppose that the market will continue to go up every day and once there is going to be a dip in the market, you don't think there will be some sort of announcement. Dips are also good for those that want to accumulate more whether it is the whales which automatically helps the little investors to jump in too.  

While we understand that some investors were crying on that date, others were actually happy it happened because it gave them the opportunity to come in or acquire more.