The problem is that even if he is right, there’s a high chance the music plays for decades still.
If he’s right and everything blows up in 35 years, he’s still going to come out far behind than if he was investing that whole time in equities, etc.
If he’s wrong, there is nothing to prove it. So it’ll be 35 years later and he’s still waiting for the blow-up, and has missed out on millions.
Macro stuff like this is too hard.
His whole thesis is un-investable because of this.