The market dip is mainly caused by fud. Negative news all over the country and some governments tag along as posing regulations for bitcoins then website banning advertisement. The weak hands who hear all this negativity sell their coin even at a loss and the sharks continuosly buy the coins very cheap.
That may also be true, because a lot of negative news circulating and the investors who buy the price of tokens at a price below the market price that causes the current price decreased.