By Dan Weil It snapped up Tesla, Coinbase and Zoom Thursday. Tesla is the No. 1 holding in Ark’s flagship Ark Innovation ETF. Investment star Cathie Wood, CEO of Ark Investment Management, is at it again, buying shares of beaten-down technology stocks, just as she promised. On Thursday, Ark exchange-traded funds purchased shares of electric car titan Tesla (TSLA) – Get Tesla Inc Report; Coinbase Global (COIN) , the largest U.S. cryptocurrency exchange; and Zoom Video Communications (ZM) – Get Zoom Video Communications, Inc. Class A Report, a video meeting service. Tesla is the No. 1 holding in…