[_ylmx]

It's not like capitalism was just put here by someone, it's how free humans will interact by default. The idea that it can be "replaced" is one of the most asinine that I've ever heard. Even in places that have tried to practice something different capitalism has still existed in the way of black markets and has always emerged as king.

[xyzzy123]

There are limits to how much a person can own without a state or an army backing them up.

That is; a society, and a social contract.

Your basic “apple-for-a-dollar” trading will always be around, sure.

But billionaires and massive wealth concentration are a thing that can only exist if society is structured to allow it.

[_khau]

Capitalism is not the default state of humans.

Trade and markets might be, absent of all outside interference (I don't think this is even possible), but capitalism has definitions that go well beyond that.