> If AGI is actually reached, capital as we know it basically becomes worthless.

If ASI is reached but is controlled by only a few, then ASI may become the most important form of capital of all. Resources, land and pre-existing installations will still be important, though.

What will truly suffer if the ASI's potential is realized, is the value of labor. If anything, capital may become more important than before.

Now this MAY be followed by attempts by governments or voters to nationalize the AI. But it can also mean that whoever is in power decides that it becomes irrelevant what the population wants.

Particularly if the ASI can be used to operate robotic police capable of pacifying the populace.