Most consumer food founders launch on gut instinct and guess wrong. The olive category has massive consumer loyalty and zero convenient portable format at a mainstream price point.

Adults who want to learn music for enjoyment have almost nowhere to go. Private lessons are built for children and competitive musicians. The recreational adult who wants to play guitar without ever performing in a recital is structurally underserved in nearly every city.

Most passive income plays require ongoing technical attention or digital platforms. Billboard investing requires neither — just capital, a high-traffic corridor, and advertisers who sign recurring contracts and pay automatically every four weeks.