Monetizing niche passions—from perfume tours to museum hacks to roping events—generates surprising millions when founders embrace specificity over competition. Sam Parr and Shaan Puri explore how obsession becomes a defensible moat: Asia Graham's scent tours, Museum Hack's $3M revenue, and a $300M horse-industry rollup reveal that being the only player in your market beats trying to be the best at something common. Enthusiasm is a defensible competitive moat; founders who refuse to hedge their genuine passion outperform generalists trying to optimize conventional categories.