Luana Lopes Lara, the 29-year-old Co-Founder of Kalshi, has become the world's youngest self-made woman billionaire. She has unseated Scale AI Co-Founder Lucy Guo, who herself surpassed singer Taylor Swift in April. This comes as the prediction market startup raised $1 billion at a valuation of $11 billion. Her 29-year-old Co-Founder Tarek Mansour has also entered the billionaire club.