Get in line, dude.
I work for AMD. I've made good money selling on the way up, but I sold WAY too much at 30, 50, and 80. My "forever kicking myself moment" was in ~2015 when it dropped below $2. I had 15k shares ready to hit "buy" on, and then convinced myself that not only do I already have enough invested in the company between my job and existing shares, but also that it would be considered insider training since I was well aware of what we were working on for the Zen core and all the products that would come in the next 3 years. I just couldn't pull the trigger. Looking back on it, no one would give a shit about someone buying less than $30k of a stock and selling at a really large profit. And also, who am I kidding, I would have sold those shares a long time ago.
NVDA was one I missed out on, but the biggest was Supermicro. That was one that went through problems with bad press from a Bloomberg article about spyware in their servers (not true), and then they had a revenue recognition problem and trading got suspended. This is a company that was growing every quarter for like 20 years. I KNEW nothing would come of it and the stock dropped to $15. Thought about buying 2k shares and I don't remember why I didn't. It's over $700 today. Hell, I meant to buy some at the most recent dip down to $310 and got sidetracked at work. Literally the next day it jumped $90. Then i told myself it would pullback and I'd get some at close to $350. FML.