A major Bitcoin whale has bought $200 million worth of BTC after selling over 11,400 BTC in recent months.Another Bitcoin whale has moved over 3,000 BTC, valued at $250 million, in a single transaction after eight years of inactivity.BlackRock, the world's largest asset manager, has accumulated 4,054 BTC, bringing its total holdings to 573,878 Bitcoin.An Ether whale added $13.8 million worth of ETH to their holdings, despite Ether's price trading lower than its peak in November 2021.