In the world of cryptocurrency, “Not your keys, not your coins” (No keys, no coins) is hailed as the supreme doctrine. However, once we step outside the circle of technical worship and start from first principles of law, we find a fatal flaw in this logic: it confuses “technical control” with “legal ownership.”

1. Deliberately Blurred Boundaries: Control vs. Possession
In S Tominaga’s view, the industry’s long-standing confusion between “Control” and “Possession” is not accidental. It is a rhetorical trick designed to help power evade legal constraints.

**Control:** a purely technical fact.
Holding the private key means you have the ability to move funds. What it proves is capability, not title.

**Possession:** a legal status.
In a legal context, it represents the legitimate relationship between the individual and the asset—recognized by society and the legal system. Just as a tenant holds the keys to an apartment (control) but does not own the apartment (ownership). In the digital world, a private key is merely that key; true “ownership” is a legal relationship that can persist even if the key is lost, stolen, or the holder becomes incapacitated.

2. The Essence of Bitcoin as “Bailment”
In the article “Bailment on a Ledger,” the author proposes a core concept: bailment. Legally, bailment refers to the situation where an owner (the bailor) delivers property into the possession of another person (the bailee) for a specific purpose, without transferring ownership.

If a system claims, “Whoever holds the private key is the legitimate owner,” then that system is, in effect, denying property protection. If a hacker steals your private key, they gain “control,” but within the legal framework, they never obtain “ownership.”

A mature system must be able to support the recovery of ownership; otherwise, it cannot align with real-world civilized society.

3. The Truth About KYC: It’s About Evidence, Not Morality
People often treat KYC (Know Your Customer) as a form of regulatory oppression. But from the standpoint of jurisprudence, KYC is a process of constructing an evidentiary chain.

**Non-KYC wallets:** can only prove technical “possession.”
When faced with inheritance, divorce property division, stolen-asset recovery, or tax audits, the lack of a connection to actual natural persons results in extremely low evidentiary weight under the law.

**KYC mechanisms:** establish an evidentiary linkage between natural persons and specific ledger records.
This means holding tokens without KYC is not “bad” or “illegal,” but legally incomplete. It makes enforcing ownership extraordinarily difficult, because you cannot clearly prove, in a dispute, “I am me.”

4. Conclusion: A Bridge to the Real World
S Tominaga points out that any system that ignores real-world complexities—such as loss, coercion, or death—will ultimately hit a wall when confronted with reality.

Private keys are tools; law is a contract. The next evolution of Bitcoin is not to keep evading law in the fog of decentralization, but to leverage its trackable ledger characteristics to build an asset system in which ownership is protected by law and supported by a complete chain of evidence.

Don’t mistake keys for rights. Real ownership is when, even if you lose the key, the law still recognizes it as your property.