Ark Invest, under the leadership of Cathie Wood, has significantly increased its investment in BitMine by acquiring 572,853 additional shares, valued at approximately $20.11 million. This move comes as Ark Invest simultaneously reduces its positions in other major companies, selling 18,204 shares of Coinbase, worth around $6.9 million, and 119,090 shares of Robinhood, valued at about $12.7 million. The strategic adjustments reflect Ark Invest's evolving portfolio management approach in the dynamic cryptocurrency market.