For example, at the time of writing, currently take the largest amount of bitcoin in the address of 167,000 BTC, to the owner. The portfolio started collecting about BTC two years ago when the address registered the first deposit of about 840 BTC. Now, there is a $ 1.4 billion BTC in the portfolio, since its inception thousands of coins have been collected. Incidentally, this bitcoin whale was able to obtain very many CTBs during each meteor increase, SOURCE https://news.bitcoin.com/the-65-percent-price-dip-has-made-bitcoin-whales-a-lot-more-btc/
Bitcoin whales are bitcoin developpers. They do transfer between their wallets to manipulate the market.