I knew the guy who turned-down being badge # 9 at DEC. Talk about decades of kicking himself. I also saw an interview on TV of the guy who had the opportunity to buy 1/3 of Microsoft for $50,000. “I think about that a lot,” he said.
Master of the understatement. :-)
Buddy of mine got in on the Google IPO, and tried to get me to buy at - IIRC - $70.
"No", I said, "Waste of Money."
Meh, C'est la vie. :-)