An Ethereum whale has withdrawn 4,037 ETH, valued at $12.66 million, from Kraken after a two-year staking period, securing a $5.08 million profit. The transaction, identified by Onchainlens, highlights the profitability of long-term staking strategies amid Ethereum's network upgrades and market volatility. The whale's decision to maintain the stake through various Ethereum upgrades and reward rate changes underscores the potential benefits of strategic staking in the cryptocurrency market.