Pretty much. VCs didn't start SpaceX, Tesla and Blue Origin, billionaires did after already earning money through other means. Another issue that plays into d

Pretty much. VCs didn't start SpaceX, Tesla and Blue Origin, billionaires did after already earning money through other means. Another issue that plays into diversification is the inherent riskiness of startups. Most will fail to create so much as a decent app while remaining on budget, who do you trust to create a reliable nuclear research lab? Even experts in the field might not have the requisite business experience, and if it fails it fails big time. You need someone like a Musk or Bezos to obsessively drive such an endeavor, and it's hard to pick out the future Musks and Bezoses if they haven't already proved themselves.