Ark Invest, the investment house led by Cathie Wood, who is often praised for her stock-picking skills, bought 546,579 shares of Coinbase on Wednesday, worth $2.9 million, according to the firm’s daily trade information newsletter. The purchase is spread out across the company’s three exchange-traded funds: Ark Innovation (ARKK), Next Generation Internet (ARKW), and Fintech Innovation (ARKF).