The morality of it aside, Palantir is probably a much safer investment bet than most others in the AI space. They're older and more established than a new startup picking up the steepness of the hype curve with a half-baked idea, but they're also newer and more agile than an aging tech giant that suffers from the innovator's dilemma and a ton of bloat. They have a strong reputation among their target market and they've been building a sound business and a lot of tooling and infrastructure on Big Data and machine learning for well over a decade.

I would feel icky investing in them but any comparison to junk bonds would be the last of my concerns.