All constructs of freedom require paradoxical rules. These rules are what establishes and helps identify, initiate, and differentiate one construct from another, and protects the trust of participants needed to engage in the marketplace construct.
Unregulated constructs cannot exist for a few bad apples present in any composition of marketplace participants would destroy the trust in the construct with a selfish vile-maxim deflating the value to all other participants.
So, unregulated marketplaces cannot exist because freedom without paradoxical rules does not yield any meaningful proxy of freedom. For the same reason, a country proclaiming to be a free country cannot exist without police and a legal system to protect precisely the abuse of personal freedom from destroying the collective freedom of others.
The question, therefore, is not whether regulation must be applied, but who enforces the regulation. Today we have no free-market systems because we have not defined but a stale monism of freedom, quite the opposite of a dynamic plurality of freedom that encircles the ingenuity and capacity of humanity.
Hence, the only way to control a marketplace construct driven by a monism of freedom is with regulations deployed by the oligarchy of such monism, stale, circumvented, and thus ineffective the minute after they have been defined.
Only when we subjugate our marketplaces to a pluralism of freedom that spawns a dynamic meritocracy can we expect the majority of regulations to come from the renewable merit of marketplace participants themselves, rather than from a third party like a government or other form of external arbitrage.
So, unregulated capitalism cannot exist, but adherence to a relativity theory of freedom (the freedom of freedom) that renews the arbitrage of the marketplace constantly by the merit of participants will allow marketplaces mostly be guided by the participants themselves rather than by the government.