It can be read in two different ways. Massive techno-optimism, or massive techno-pessimism but facing a reality where humans are increasingly less valuable.

In the first case, buy AI stocks. In the second case, build a bunker in the wilderness.

I don't think they are actually talking about the stock market and are just saying they think AI will destroy everything (referencing Nick Bostrom's Paperclip Maximizer theory).