Ballerina, 29, becomes the world’s youngest self-made female billionaire – after ditching her dancing and taking an ‘insane’ risk

'There are few better trainings for being told 'no' and pushing through anyway than being a professional ballerina,' said a16z partner Alex Immerman. Since that ruling, Kalshi's growth has turned feral. Trading volume has soared 1000 per cent, now topping $1billion every week. The platform has integrated with Robinhood, Webull, StockX, Google Finance and even the National Hockey League. Donald Trump Jr. joined its advisory board in January, months after signing up with Polymarket. Kalshi has also moved aggressively into crypto, launching markets on Solana in December. Despite new clashes with state regulators over sports markets, investors remain wildly bullish. 'I don't know that we have funded a company with as much potential impact as this one,' said Y Combinator's Michael Seibel.