ARK Invest, led by Cathie Wood, has increased its investment in BitMine by $15 million, raising its total holdings to over $300 million. This move is part of ARK's broader strategy to expand its presence in crypto-related sectors, as it has also recently increased its stakes in Bullish and Robinhood. ARK's significant investment in BitMine began on July 21 with a $174 million purchase, followed by an additional $17 million on August 2.