Investors aren't much concerned with warnings that AI will "kill all humans." The big picture: It turns out the potential for apocalypse brought on by a superintelligence is surprisingly bullish for AI companies — at least in the short term.State of play: This week, insiders at Anthropic aired their concerns that AI could get out of control and destroy humanity. This kind of talk coming so soon before the company's expected IPO raised eyebrows and prompted jokes on social media.What it didn't do, particularly, was worry many AI investors. Reality check: Asked if they care about the AI apocalypse, Naveen Sarma, an analyst at S&P, told Axios, "No.""They're not looking at, you know, does this company end civilization?" he says. "That isn't necessarily a question that comes up in our meetings.""We are at a point where the focus is more on the revenue opportunity these companies have — given how fast they have grown," says Mandeep Singh, global head of technology research at Bloomberg Intelligence.The idea that these models are so powerful that they pose an existential risk, if anything, is a factor in their favor — it would mean that companies and governments are going to have to spend money on AI to defend against its risks.Because the threat is so high, in other words, corporate and government AI spending goes from being a discretionary nice-to-have, to a non-discretionary must buy. That's good for the bottom line of any AI company.Zoom out: Anthropic's warnings and the idea of P(doom) (a measure of AI's likely risk) are getting a lot of attention and raising awareness. That's a good thing, some investors said."That's what you want when you are doing an IPO roadshow," says Singh.Yes, but: "Investors are all over the map," says Paul Kedrosky, a noted investor himself. Some believe all the doom talk could backfire by getting the White House to take a piece of the company, and dilute shareholders' investments, he says.Says Mark Malek, chief investment officer at Siebert: "It's telling that Anthropic's own founder has put a number on the odds that his creation could disrupt — or even endanger — humanity."What to watch: "As an investor, I'm far less worried about AI ending humanity than about it causing operational or security failures with real financial consequences," he adds.Malek points to the example of CrowdStrike, which released a flawed software update a few years ago that wiped out a good chunk of its market cap. "That's the more realistic template for how an AI stumble — not a doomsday scenario, but an operational one — would actually hit a portfolio."The bottom line: If the real risk here is the literal end of civilization, there's not much an investor can do. Existential risk is hard to hedge.