If you think that companies by introverts are undervalued, a ton of money could be made exploiting this trend.
(1) Breakthrough technologies and/or amazing numbers.
(2) Introverted founders passed over by other investors.
(3) A sales process that is not in-person where being introverted, understated, or shy is not a major handicap. Companies with mostly inbound, viral, indirect, or automated sales processes or that can outsource sales easily would work.
What tools could you use to decrease the friction caused because introversion makes a founder harder to find?