A prominent crypto whale, known as 'Jianding Zuo Duo' (0x90924), closed a 40x leveraged Bitcoin long position worth approximately $13.18 million, involving 150 BTC, within a span of 10 minutes on December 30, according to Hyperinsight. Despite this closure, the whale continues to hold a substantial altcoin portfolio valued at $17.53 million. The altcoin holdings, maintained with an average leverage of 8x, include major cryptocurrencies such as Ethereum (ETH), Solana (SOL), and Sui (SUI), among others. The portfolio currently shows a floating profit of $65,000, indicating ongoing active trading across various digital assets.