Gates has had great success investing outside of the tech industry. For example, he owns quite a bit of farmland in the United States. That's right. One of the top tech titans over the past 40+ years has invested heavily in farmland.
"Through Cascade Investment, Gates owns roughly 242,000 acres across 19 states. That's enough to make him the largest private owner of farmland in the United States."
https://finance.yahoo.com/news/owns-more-farmland-bill-gates-200014217.html