A trader who previously went long on 321.46 BTC, valued at $26.14 million, has expanded their position by opening a new 5x long on 307.7 BTC, worth $25.04 million. This move, executed through a newly created wallet, brings the trader's total Bitcoin position to 629.16 BTC, amounting to $51.18 million. The activity highlights continued bullish sentiment in the market.