Pegging "capitalism" into a teleological historiographic narrative (aimed at justifying non-capital producing collectivist dictatorships) has been around for so long that its retro chic again.
That wasn't at all my intention. But nor is it unreasonable to argue that capitalism as it is practiced today cannot sustain itself indefinitely. Nothing teleological or prophetic about it.
To my ear that's like saying evolution cannot sustain itself indefinitely. As long as there are generational selective pressures on imperfect replicators, evolution will continue.
Without a superstructure of omnipresent social domination to hinder or disrupt it, capitalism will be used where countable savings for investment and idea that promising accountable returns find themselves together.
Here's a thought to explain my defense of capitalism: capitalism doesn't cause corruption, but like anything else it is destroyed by corruption. Capitalism is used by the corrupt because it is so good at identifying that which the market values and in delivering it.