A "tech billionaire" refers to someone who has become extremely rich by creating or investing in technology-related companies or ventures. They have accumulated billions of dollars through their involvement in the tech industry. Full definition
For what it's worth, I enjoyed Jackson's performance as an infantilized tech billionaire who serves a McDonald's banquet to guests of honour at his palatial estate. (filmfreakcentral.net)
Case in point is the pioneering electric car company, Tesla, owned by tech billionaire Elon Musk. (bitcoinist.com)
LeEco was founded by Chinese tech billionaire Jia Yueting. (lasvegasnow.com)