If I buy oranges for $1 and sell them for $0.50 and I sell a lot of oranges, can I reasonably say that I've found a market?

Hrm..

Were you around here ten years ago when that exact argument was regularly regurgitated about Uber? Notice that argument is no longer popular?

The point is that losing money isn't a sure sign that a business is doomed. Who knows where OpenAI will end up, but people still line up to invest. Those investors have billions reasons to be due diligent. Unlike what's claimed around here, most of investors aren't stupid. You yourself wouldn't be stupid either if money is at stake.

Not saying you are wrong, but let's not forget the famous crashes of 1929, .com, and 2008 bubbles.