A whale described as the largest short seller in ZEC increased its bearish exposure to ETH and ZEC on December 26 by transferring 4,000,000 USDC to HyperLiquid and opening 15x leveraged ETH and 5x leveraged ZEC short positions, according to OnchainLens cited by BlockBeats. The trader now holds 8 positions with a combined notional value of about $148.8 million, including a $130 million ETH short and a $12 million ZEC short. Unrealized profit on these positions exceeds $17 million, while total account profit is over $38 million.

At least $6 million has been stolen from hundreds of Trust Wallet users, ZachXBT said on Dec. 26. Trust Wallet confirmed a vulnerability in its Browser Extension version 2.68 and urged users to disable the affected version and upgrade to version 2.69 through the official Chrome Web Store.

A large trader opened a $31 million Bitcoin short position on Hyperliquid at an entry price of $87,718.8 on Dec. 26, HyperInsight data show. The same whale also initiated a smaller AAVE short position worth approximately $100,000 at an entry level of $150.

U.S. SEC filings registered a record surge in blockchain-related mentions across 2025, reaching about 8,000 references in August and staying high in November, BlockBeats reports on Dec. 26. Bitcoin-related references dominated the upswing, accounting for the largest share of filing activity as submissions and amendments concerning Bitcoin spot ETFs increased. Traditional asset managers also continued in 2025 to expand their cryptocurrency product offerings.

Bitcoin traded at $87,115 on December 26, down 0.48% over 24 hours, while Ethereum fell 1.68% to $2,897 and Solana slipped below $120, HTX data show. Total cryptocurrency market capitalization stands at $3.021 trillion, down 0.6% in 24 hours, with about 300,000 BTC options contracts worth roughly $23.7 billion set to expire, bringing combined BTC and ETH options expiries to $28.5 billion, approximately twice the scale of the same period last year. Among altcoins, BIFI rose 78% to $238.4, ZBT gained 55.2% to $0.1557, and 0G climbed 29.3% to $1.034, while METIS fell 12.8% to $5.79, BANANA declined 12.05% to $7.14, and DOLO dropped 10.08% to $0.03811 over 24 hours.

Trust Wallet disclosed on Dec. 26 that its browser extension version 2.68 contains a security vulnerability. The company urged users to disable the affected version and upgrade to version 2.69 through the official Chrome Web Store link. Mobile-only users and other extension versions remain unaffected, with further updates to follow.

Ethereum's net supply increased by 18,614 ETH in the seven days ending Dec. 26, Ultrasound.money data show. Total supply stands at 121,318,655 ETH, with the current annualized supply growth rate at 0.8%.

BTC OG insider whale added 207,316.32 SOL long positions on Dec. 25, valued at $25.498 million, BlockBeats and Ai 姨 (@ai_9684xtpa) report. Limit buy orders for 2,683.68 SOL remain pending between $122.74 and $123.01. The whale's SOL position stands at $63.06 million, with total holdings of $754 million and unrealized losses of $43.32 million, primarily from ETH at $37.33 million.