Palantir and Nvidia have been great performers, but one stock looks like the one to own for 2026.Two companies that have benefited the most from the artificial intelligence (AI) boom are Palantir Technologies (PLTR +0.07%) and Nvidia (NVDA 0.49%). Palantir is establishing itself as a leader in becoming an AI operating system, and Nvidia is the dominant chipmaker fueling the AI infrastructure buildout.While both stocks have been massive outperformers the past few years, let's see which one is the best to own ...