Airbnb is famous now, but the founding story is the useful part. Three founders, maxed credit cards, and a cereal-box stunt that kept the lights on.
They were rejected by dozens of investors who all "loved the idea". The lesson is not persistence as a slogan — it is that the market decides, not the gatekeepers.
Every founder who has been told no by people who were sure should study that period. The nos were rational. The company was real anyway.
Business stories are about decisions: where the money comes from, what gets built and what happens next.