Palantir has been growing rapidly with no signs of slowing down.Palantir Technologies (PLTR -1.60%) has been one of the market's top-performing stocks over the past few years. It's up over 135% so far in 2025, leading investors to wonder if it's too late to buy shares now. Picking a stock winner over a month or two can be a difficult job, so I prefer to focus on a longer time frame. By focusing on a three to five-year time frame, you can let business results affect the stock more than market sentiment.Three ...