It could be argued but it’s a large assumption on its own.

Stock markets are recent inventions; some hand wavy way of saying “this is exactly the right way to store value!”

Why must that ideal be externalized onto others? Why do I have to believe some hedge fund is indeed worth N dollars?

Mendacity of the elderly is not a good enough justification for belief.

Correctly engineering a road, medicine, or making art does not at all rely on such belief.