This can mean a lot of things.. The Whale might do this, because he wants to buy cheaper coins.. so by transferring this large amount of coins to the exchange, he knows this will trigger a flag on Twitter and social media and then when the price drop.. he picks up cheaper coins.

It can also mean that the Whale are preparing for a large spike in the price and that he wants his coins to be ready on the exchange when this happens. In any way, this amount of coins are not going to have a lasting affect on the global price of Bitcoin, because it will be absorbed by the current demand.