The huge capitals and the companies drowning in cash are certainly there, but the potentially profitable investment opportunities are scarce. Most of the infrastructure in the West has already been built, fertility is declining and no new groundbreaking tech is able to spur a new economic revolution. That gives rise to all kinds of speculative economic activity that are, at best, a zero-sum game.

Contrast that to the post-WWII years: you had an increasing population and a huge demand for new infrastructure. The Cold War space race was also a huge technological boost.