For a (free) market to function, at all, it needs active economic agents.
Which economic agents need, in their turn, certain amounts of concentrated resources at their disposal. A certain amount of ‘capital’. Regardless of who owns it. Or disposes of it.

In this sense, no matter where each of them finds itself on the individual to socialist spectrum, all societies are ‘capitalist’.

On the other hand, individual capitalists – economic agents, do not need a free market to thrive. The do indeed need a market to sell their products/services, only that market does not have to be free. On the contrary, even.

OK, no monopolistic market has survived for long. And all monopolies have eventually failed. Even those who had grown ‘too big to fail’!

But go and tell this to any of those who happen to be at the helm of a monopoly… be it of economic or political nature …