I read this today and it made me wonder what exactly is the purpose of whales moving Bitcoin around like this?

https://www.fxstreet.com/cryptocurrencies/news/bitcoin-whales-move-3-billion-in-just-six-hours-201907302301?utm_source=tradingview&utm_medium=rss&utm_campaign=254b9d70-7c4b-481b-a94e-aaac0c60ed14

Are they splitting the coin up into smaller wallets so they do not keep all their eggs in one basket?  Any other reasons why?