Tesla's stock fell sharply following its earnings release, but some famous names on Wall Street, including Cathie Wood, saw the dip as a buying opportunity. Wood's firm, Ark Investment Management, bought Tesla stock on more than one occasion after the earnings-related drop, purchasing about $53.5 million in shares as of writing. Buying Tesla stock right now, expecting a rebound over the next six months (or so), likely isn't a wise move. Its robotaxi business could become a significant source of revenue and higher margin profits than the sale of electric vehicles. Also, as management's recent comments highlight, the company's robotaxi business faces risks.