USDC Treasury minted 85 million USDC on the Solana blockchain on Dec. 13, Whale Alert data show. The on-chain activity was flagged by the monitoring service five minutes after issuance.

A BTC OG whale lifted its ETH 5× leveraged long position to $540 million on Dec. 13, while combined BTC, ETH and SOL leveraged longs are valued at over $620 million, HyperInsight data show. The ETH position uses 5× leverage and is marked at $540 million, with pending limit long orders indicating an additional $17 million intended between $3,030 and $3,051.8; the current entry price stands at $3,173.36 with a floating loss of $20 million. The BTC 5× leveraged long is valued at $90 million, opened at $91,506.7 and showing an unrealized loss of $2 million, while the SOL 5× leveraged long stands at $34 million with a $137.5 entry and a $1.5 million unrealized loss.

Whale trader Huang Licheng, known as "Machi Big Brother", was liquidated on 6,489 ETH on Dec. 12, incurring a loss of $720,000, on-chain analyst Ai Auntie (@ai_9684xtpa) reports. He now holds a remaining long position of 2,500 ETH worth $7.79M, with a liquidation price at $3,074.62 and an unrealized loss of $314,000. Huang's account balance dropped to $340,000, with total losses over the past week reaching $2.44M.

A prominent Bitcoin OG insider whale's 5x leveraged long positions in BTC, ETH and SOL shifted into floating losses amid a market drop on Dec. 12, with combined position value above $620 million, HyperInsight data show. The ETH 5x long position exceeds $500 million, with limit orders placed to add $64 million of exposure in the $3,030–$3,112.4 range; the entry price stands at $3,181.96 with a $9 million floating loss. The BTC 5x long position is valued at $90 million, entered at $91,506.7 with a $1 million floating loss as of Dec. 12. The SOL 5x long position carries a $34 million value, entered at $137.5, with a $700,000 floating loss recorded on Dec. 12.

Binance Wallet's team issued a security notice on Dec. 12 confirming the ZEROBASE platform frontend was compromised, which led some users to approve malicious contracts. To safeguard funds, Binance Wallet blocked suspected malicious domains, added the related contracts to a blacklist, and committed to send alerts within 30 minutes to affected users. ZEROBASE separately stated that phishing contracts appeared on BNB Chain, impersonating its official interface to trick users into granting USDT approvals. Binance strongly advised users to open the wallet app, review authorization options on the assets page, and revoke any suspicious approvals to reduce the risk of loss.

Curve DAO approved raising YieldBasis's crvUSD credit line from $300 million to $1 billion on Dec. 12, BlockBeats reports. The $1 billion figure represents a maximum limit rather than an immediate allocation, with usage expected to scale as crvUSD liquidity grows. While Curve DAO sets the overall credit ceiling, YieldBasis must raise caps for individual YB markets through separate governance votes.

Interactive Brokers will allow clients to fund brokerage accounts using stablecoins starting Dec. 12, Bloomberg reports. The feature adds stablecoin deposits as a new funding method for users of the platform.

A Bitcoin whale deposited 200 BTC, worth approximately $18.46 million, to Binance on Dec. 12 after three years of inactivity, Onchain Lens data show. The address had accumulated 400 BTC at an average price of roughly $24,500, then valued at $9.83 million, and now holds unrealized gains exceeding $27.03 million.