**[Metaplanet Launches Stock Buyback Program to Optimize Capital Allocation and Enhance Bitcoin Returns]** On October 28, 2025, Japanese Bitcoin treasury company Metaplanet announced that its board of directors has approved the establishment of a stock buyback program aimed at optimizing capital allocation and maximizing Bitcoin returns. The company stated that due to increased market volatility and a decline in mNAV, the current stock price does not fully reflect its intrinsic economic value. Therefore, the program has been initiated as part of a prudent capital management strategy. The plan is particularly effective when mNAV is below 1.0x. To support the flexible execution of the buyback program, the board has approved a credit facility of up to $500 million (approximately ¥76.4 billion), allowing the company to quickly borrow funds using Bitcoin as collateral. The proceeds will be used to further acquire Bitcoin, invest in Bitcoin yield-generating businesses, or repurchase shares. This arrangement is also part of the company’s broader financial strategy and may serve as a transitional financing measure for future preferred stock issuances.

[A Whale Address Withdraws 894 Bitcoins from Kraken Within 5 Days] According to Onchain Lens monitoring, a whale address has withdrawn 894 Bitcoins from the Kraken platform over the past 5 days, valued at approximately $101.82 million.

402bridge遭到攻击，约1.7万美元USDC被盗。用户需立即撤销对地址0xed1AFc4DCfb39b9ab9d67f3f7f7d02803cEA9FC5的授权。（PeckShieldAlert）

BlackRock以太坊现货ETF于10月27日购买了1.744万枚ETH，总价值约为7250万美元。（Cointelegraph）

[SlowMist Cosine: 402Bridge attack caused by private key leak, possibly involving insider actions] SlowMist Cosine analysis indicates that the cross-chain bridge project 402Bridge was attacked due to a private key leak, and the possibility of insider involvement cannot be ruled out. The domain name 402bridge.fun ceased service just two days after registration, and there have been no further movements of the stolen funds so far. This is the first publicly disclosed security incident related to the 402 protocol's services. SlowMist Cosine stated that this incident is not a typical case of collective malicious behavior by the project team.