Absolutely no

Anyone in America is currently doing so

Nope. But a capitalist must acquire capital and not just wealth. Capitalism does not describe the current state of affairs in the US.

socialism is based on the suppression of natural human desires, and requires total submission of all society to be even theoretically workable.

There are many wolfs wearing lambs cloth so probably possible.

I’m assuming that you are American and you think the USA is capitalist. We are a crony system

Black markets are a thing.

Only if the socialists allow it to keep their people well enough fed to avoid being overthrown.

Yes. US govt officials are capitalist living in a socialist society. Threy close perfectly solid banks that are not to their liking, fix the price of bonds, sell strategic oil reserves. US is becoming like China fast

I don’t want to find out