Brian Chesky struggled to pay his rent and had no business experience when he started Airbnb. The first attempts to rent air mattresses in their apartment barely succeeded. Investors rejected them repeatedly, doubting people would trust strangers in their homes. But Chesky and his team persisted, redesigning the website and creating a seamless user experience. When major funding came, Airbnb scaled globally. His story shows that persistence, creativity, and solving a real problem can turn a tiny idea into a multi-billion-dollar business.