A trader has successfully expanded their initial $3 million investment to $10 million within five days by leveraging short positions, according to market data. The trader, identified by the address 0xD83…Fd7, currently holds significant short positions in Bitcoin (BTC) and Ethereum (ETH), with a combined notional value of $250 million. This includes 1,640 BTC valued at $150 million and 31,093 ETH valued at $100 million. As cryptocurrency prices declined, the trader increased their BTC short positions an hour ago, achieving a total floating profit of $6.81 million. This strategic maneuver highlights the trader's adeptness in capitalizing on market downturns to enhance their portfolio significantly.