Teladoc's share performance has reflected its earnings struggles... Superstar investor Cathie Wood is known for picking up promising stocks when they're down -- the founder and chief executive officer of Ark Invest doesn't mind going against the crowd. She's focused on innovative companies with promising long-term prospects, and these sorts of stocks populate her funds. Wood doesn't count on them delivering overnight but instead generating lasting growth over a period of years. This top investor is betting ...