Cathie Wood, the popular stock guru who heads Ark Investment Management, is sounding outlandishly bullish notes on two favorites: Tesla and Bitcoin. “If we are right, the returns are enormous,” she told the SALT Conference in New York, hitting her theme that tech disruption will rule the investing world. Speaking at the gathering, Wood, the darling of the meme set, said the electric vehicle maker would vault in price almost four times, to $3,000, in five years. And maybe to $4,000. Riding a good rally during the pandemic, Tesla is up to $743, as of Monday’s market close. That’s not...