Are they splitting the coin up into smaller wallets so they do not keep all their eggs in one basket? Any other reasons why?
There is a wide possible range of speculations that we can make when it comes to why whales move their coins around. Firstly, with whales being whales, it could be an attempt at market manipulation, trying to cause some FUDs when big amounts are seen moving on the blockchain. Secondly, although unclear, it could also be a result of coin tumbling, which the big traders use to get their hands on untraceable coins.
Got it, great comment there. I don't know why but a lot of people thinks it's because they have to move their coins from old wallets into new ones and keep them secure and etc. Well, yes, at some point such transactions are done by exchanges for those purposes but that's rare and it doesn't shine too. But usually whales do huge transactions to gain attention from others because it usually gets under attention very easily and famous news websites like cointelegraph, ccn and etc often post about huge moves from one wallet to another which is an extra help for them to achieve their goal.