As you know , if you are trading at Dex you could easily see x100 pumps . After that pump, price down to usual point. So what is that meaning? If any whale wants to collect the tokens, there are many better ways to collect them more cheaper. Any clue ? is that money laundring?
it COULD be money laundering, but that wouldn't be my first guess haha

They are just making profits
Whales manipulate and control supplies of small cap coins, they can take only a few
BTC in some cases, move a coin 200+%, and get others to FOMO in
Then they dump the cheap coins the have been collecting for weeks of the small cap coin. Rinse and Repeat. In crypto its not even illegal as theres no one regulating body monitoring ALL exchanges : /