I had $10,000 in an etrade account ready to invest in Tesla shares when it was ~$35. the money had just cleared, and i was going to buy the shares the next morning. that night, i went out to dinner with my parents, and my father (who has made prudent and successful financial decisions all his life) was adamantly opposed to the choice and talked me out of it.
obviously i did eventually buy in, but it wasn't until about $230 per share. it's silly to complain, though. can't change the past, and i still did okay, haha!
by the way, went out to dinner with my parents recently, was bragging about my gains, and my Dad was like "why didn't you tell me to invest in Tesla?!"