In no particular order
1. In 1999, a small internet company had the option to buy Google for $750,000. The CEO said no.
2. In the early 2000s, Blockbuster coudl've bought Netflix. But the CEO said "no thanks, we're good.
3. MySpace was offered to buy Facebook... twice. And they declined. Twice.
4. BlackBerry refused to develop its touchscreen technology and an app store because they thought it was a fad.
5. The BBC refused to acknowledge the success of Top Gear, assumed it was due to the format, not the stars, and assumed two of the three stars of the programme would stay if the main lead left. They were wrong on all three counts, and Top Gear is now dead.
6. The SEC does everything it can to kill crypto in 2023. See what happens