[Cathie Wood: The Most Underrated Field for AI Innovation is Healthcare] Ark Invest founder Cathie Wood stated in an interview that the most underrated field for artificial intelligence innovation is healthcare. AI will diagnose cancer through blood tests before symptoms appear. Over the next five years, the pharmaceutical industry will face a $300 billion patent cliff (referring to the sharp decline in sales and profits that companies experience once patent protection expires). This fear and caution inherently contain opportunities.