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.

And the more we think about it the more meanings we could find behind the actions of this whale, as we know bitcoin is losing market dominance due to the current bubble we are experimenting thanks to DeFi so there is the possibility this whale will use his capital to fund several projects of this kind and try to multiply his money many times over and then buy bitcoin again preparing himself for the bull run that is coming.
So as we can see the number of explanations for this and other movements is simply too big to count and most likely we will never get a definitive answer to what happened in the end.