Bitmine, the largest Ethereum treasury company, has staked 74,880 ETH, valued at $219 million, in Ethereum's Proof of Stake (PoS) system to earn interest. This marks Bitmine's first foray into staking. The company currently holds 4.066 million ETH. At the current annual percentage yield (APY) of approximately 3.12%, staking their entire holdings could yield about 126,800 ETH in interest annually, worth $371 million at the current price of $2,927 per ETH.