What is the trepidation surrounding this stock based in?

I’m a young investor with less than a year’s history in the market. I understand apprehensions about the recent drop - but why is there so much anxiety about Nvidia passing $150? $130?

It’s a trend that I’m sure will continue. I believe in this company and I believe it will continue to rise, but why are these landmark numbers such suckers to investors? It just seems like children are in this market rather than rational people.

I understand selling with the news, or whatever, but this is not it. What lesson can I learn from this seemingly irrationality?