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In 2025, the number of billionaires worldwide surged to a record 3,148, fueled by significant gains in AI stocks and major IPOs, with total billionaire wealth reaching $18.7 trillion. Notably, Shayne Coplan became the youngest self-made billionaire at 27 after Polymarket's $9 billion valuation, a record soon eclipsed by the 22-year-old co-founders of Mercor at $10 billion. The year also saw the emergence of new billionaires across various sectors, including cryptocurrency and defense, while Albania welcomed its first billionaire, Samir Mane.