What’s the stock you regret NOT buying the most?

For me it's an easy pick, NVDA.

Working in software engineering and having studied it, NVDA was massively hyped in engineering circles before the AI hype. I was researching it in 2020 and decided not to pull the trigger since I couldn't completely understand the long term business model. Oh well.

It sticks out to me the most since I understood the technical MOAT but did not want to take the risk. Hindsight is 20/20.

Is there any stock that particularly stands out for you?