I have certainly gotten very lucky in several important ways, financially. And in smaller ways. Stumbled into a merger trade I wasn't anticipating just a year ago.
I think it's Buffett or maybe Munger who said you can only expect to find four or five really good (i.e. seriously underpriced) investments in your lifetime, and you just have to jump on them. Stumbling onto them is luck. Taking advantage of them is skill.
Back in 1998, I second-guessed myself on eBay and missed out on its massive boom, which is a mistake I will never make again.
I think in the stock market an awful lot of skill is just paying massive amounts of *attention* -- in the case of Tesla, just knowing real information and ignoring disinformation gets you further than 95% of traders. And then most of the rest of it is knowing how not to misinterpret the information you get.
For instance, *twice* I sold companies because they were chaotic flaming messes in terms of internal management. Both times I was wrong; companies did fine. I avoided two software companies because their software was hot garbage with clearly-incompetent IT management. Also wrong; they did great.
Once I kept a company despite evidence that the management had completely wrong priorities. That was a serious error.
The closest thing to that with Tesla is the obsession with "full self driving". I *think* it hasn't gotten out of control yet --but I hope the company remembers their mission statement, which does not have anything to do with "full self driving" and is all about eliminating fossil fuels.