I don't know how to make sense of this level of investment. I feel that I lack the proper conceptual framework to make sense of the purchasing power of half a trillion USD in this context.
Maybe your calibration isn't poor. Maybe they really are all wrong but there's a tendency here to these these people behind the scenes are all charlatans, fueling hype without equal substance hoping to make a quick buck before it all comes crashing down, but i don't think that's true at all. I think these people really genuinely believe they're going to get there. And if you genuinely think that, them this kind of investment isn't so crazy.
A 500B dollar investment doesn't just fall into one's lap. It's not your run of the mill funding round. No, this is something you very actively work towards that your funders must be really damn convinced is worth the gamble. No one sane is going to look at what they genuinely believe to be a dead end and try to garner up Manhattan Project scales of investment. Careers have been nuked for far less.