Now this person who did all the selling and dropping the price could be an early bird, does he have a lot of money? Sure, does that mean he is a whale? Not in the sense I just talked about, that person is rich but he just got lucky, he is not like wall street CEO rich who keeps getting millions of dollars no matter what.
A whale just refers specifically to the amount of bitcoin they own. Some are smart and shrewd some are dumb and lucky but either way they are whales
https://www.investopedia.com/terms/b/bitcoin-whale.asp