A few good ones is good enough to make you a fortune. Most people cannot do that.
I was still a student during dot.com bust. So I didn't get to experience it. The only big time sell off I experienced was in 2008, 2009, but again I was working in an investment company, so I couldn't do trades as I wished to. I only remembered our hedge funds experienced 30% big drop in a year. Wish I invested way earlier.