I've made about 250 percent on my Nvidia stock this year, and there's no end in sight. My retirement funds would like to thank everyone responsible for the AI revolution. I'd like to say I'm a stock market visionary, but I bought Nvidia because of their gaming GPUs. My Intel is only up by about 30 percent, but since QQQ (a NASDAQ index), which is my only other stock, is at 40 percent, that means Intel is underperforming this year. The rest of my retirement is in bond funds. But things are looking good for not having to go back to work.
The worst stock move I ever made was in the early 2000's. I sold ten thousand shares of Ipix stock at a significant loss for around 20 cents per share and a week later it went to $28/share (they were a tech security company and some sort of terrorist scare had occurred). The worst part was that my wife and I had just had our second kid (Guido), and I was in the middle of my personal "dark ages", so we really needed the money, which is why I was trying to cut my losses with Ipix. If I had held on to that stock another week it would have changed our lives. My wife didn't pay any attention to our investments, and I never told her about it. Everything is great now, of course, so that's all that matters, but I still haven't completely gotten over losing over a quarter of a million dollars.
Of course, I wouldn't have actually sold it at $28/share. As soon as it went above what I paid for it (something like 30 cents), I would have sold it, so really I didn't lose much.