Gonna repeat this again. Do not worry about "overpaying" for a great company with a great product. Sure the price will fluctuate a bit.....but if you own a great company.....at the end of the day you will be happy regardless of paying a bit more at times. dollar cost averaging is you freind.
Just being a ornery devil, I imagine many folks visiting this site drive "Silverado" or "F150s" trucks and believe they are reasonably good products. Some closet "greenies" might be pushing Tesla trucks!
If you dollar-cost-averaging bought 100 shares of either GM / Ford during each of the first 5 (2015, 2016, 2017, 2018, 2019) of the last 10 years (and held them), what would your investment be worth today. You do the math. Yes, the stock market does - over the long run - appear to always go up (otherwise folks would probably buy real estate or bury their dough in a can in the back yard); however, a rising tide doesn't always raise all boats (research the highly controversial trickle-down economics arguments).
Overall, I would pretty much agree with foggy ... as long as the company is sound in fundamentals, led by creative and intelligent managers, and
not at the apex of its share-price history with P/ERs in the stratosphere. NO, I wouldn't buy PLTR today, or probably anytime in the near future .... unless, I was a dipper-flipper and the share price had dropped 30%. But, I ain't a D-F'er ... I lean Fioggy's way.
P.S. I did take a flyer (a dipper) on Chrysler at at under $2 many moons ago and made good bucks when selling it in the 80's Even though you can't buy Chrysler stock now, its parent company Stallantis is right there with Ford at $10/change.