"Shark" is a term used to refer to traders with huge assets in the cryptocurrency market. Because of strong potential, sharks can increase the price of a coin a dozen times, but can also cause price to fall dramatically, costing a dozen times. So we can take advantage of opportunity to make money under "Shark".
There are shark who dump and then sharks who pump. But more importantly a shark dumped their coins here yesterday making the market crash and the price went dipping by +10% each. Now we are in a sea of red like the usual while reddit subs are filled with money grabbing shills calling this the end of crypto.
Truth is that price s dropping does not make the coin worthless. It is going to rise again when there is money coming into the market. Its the sharks again who are going to put in their money and make it move.