Unchained

There are less than 1 million bitcoin left to ever be mined, after today. Bitcoin has kept the same monetary policy since it launched in 2009. That’s what certainty looks like in an uncertain world.

“Decentralization defends the fixed supply [of bitcoin].” -@dhruvbansal From the presentation “Bitcoin, Not Crypto” by @dhruvbansal and @parkeralewis originally filmed April 2025.

Even if the strongest quantum computer had the ability to attack bitcoin keys, it could only target 1 key at a time. If it took a day per key, attacking the 8.6% of vulnerable (probably lost) coins would take 60 years.

“Money converges to one. But it doesn’t do so by random chance; it does so by necessity.” -@parkeralewis From the presentation “Bitcoin, Not Crypto” by @dhruvbansal and @parkeralewis originally filmed April 2025.

Quantum concerns for bitcoin? Our new research with @ARKInvest tackles them head-on. @dpuellARK, @dhruvbansal, and @tom_honzik unpack: – Why quantum is a gradual journey, not sudden "Q-Day" – How most of bitcoin's network already resists quantum threats – And a realistic outlook on timelines, risks, and bitcoin’s ability to adapt Download your copy here ⤵️ unchained.com/go/bitcoin-and…

Register here ⤵️ 2026.b.tc

The climb to the top is never straightforward. We’ll be at @TheBitcoinConf in Las Vegas, April 27–29, looking forward to thoughtful conversations about where bitcoin’s future is heading. If you’re attending, reach out. If you need a ticket, use the code UNCHAINED10 to get 10% off registration.

"Bitcoin's core strength is its ability to be fully self-owned. If you hold your keys, you're in control. No third party can freeze or seize your bitcoin." - @josephkelly Check out the recent episode of Deep Dive Podcast where @Rachelwolf00 sat down with @unchained CEO, @josephkelly. They discuss: - How bitcoin custody has evolved over the past decade - The regulatory landscape and its impact on bitcoin self-custody - Practical steps to safeguard your bitcoin and plan for inheritance youtube.com/watch?v=8f0JNH…

This week bitcoin's circulating supply hit 20 million. People saw this event coming over a decade ago. That's predictability in an unpredictable world. Onboard to bitcoin with Unchained's concierge service and use promo code: 20MILLION ^20% off for a limited time.

In collaboration with @unchained, ARK Invest's new paper on Bitcoin and Quantum computing is live! ---- Bitcoin and Quantum Computing This paper assesses whether and how advances in quantum computing (QC) pose a risk to Bitcoin. Our two central arguments are as follows: 1. Quantum is a long-term risk but not an imminent threat. The community must continue to research and make plans for protecting the network as quantum computers improve. 2. If quantum computing were to affect Bitcoin’s cryptography, the process would be protracted and undertaken at a cost to the attacker. Today’s quantum systems lack the capabilities required to compromise Bitcoin. Meaningful breakthroughs would disrupt internet security first, triggering coordinated responses well beyond Bitcoin. In our view, quantum development will be a gradual technological progression—not a sudden “Q-day” event—giving markets and the Bitcoin network time to adapt. Quantum computers use qubits that can exist in superposition, enabling quantum algorithms to scale more quickly than classical algorithms. Their performance is measured by parameters like the number of logical qubits and the degree of logical depth, both of which must be high and error-corrected to have an impact on Bitcoin. Today’s systems operate in the so-called “NISQ era”—roughly 100 logical qubits and circuit depths in the hundreds—both well below the thresholds necessary to break Bitcoin’s elliptic curve cryptography (ECC). To do so would require at least 2,330 logical qubits and tens of millions to billions of quantum gates. Of the Bitcoin supply currently exposed to the quantum threat, ~1.7 million bitcoin (BTC) lie in vulnerable P2PK address types and are believed to be lost, and ~5.2 million BTC lie in migratable re-used or P2TR addresses—adding to ~35% of total outstanding supply. That said, quantum risk is unlikely to surface as an event but as a protracted sequence of observable milestones, as follows: Stage 0: Quantum computers exist but are not commercially useful. Today’s quantum computers operate with limited logical qubits and high error rates, presenting no threat to Bitcoin. Stage 1: Quantum computers become commercially useful in fields like chemistry and materials simulation, well before cryptographic applications manifest. Stage 2: Quantum computing becomes powerful enough to break weak keys or deprecated cryptosystems. Stage 3: Quantum computers can break elliptic curve cryptography of the kind used for bitcoin keys, but they take a long time to do so. Quantum-vulnerable bitcoin is now at risk. Stage 4: Key-breaking occurs more quickly than Bitcoin’s 10-minute block time, network viability requiring protocol-level, post-quantum cryptography upgrades. Against that backdrop, the most important investment-related questions are: 1. When will quantum computing break an elliptic curve key for the first time, and when will the subsequent break take place? 2. Who will control early quantum capability, and what will be their incentives? 3. What will quantum attacks cost relative to other more profitable or rewarding efforts? 4. How effectively will the Bitcoin community coordinate governance decisions and implement post-quantum cryptography? This paper argues that quantum risk will evolve over an extended period of time, with many intermediate warning signals and decision points. An abrupt single point of failure is unlikely.

Don't miss our white paper, in collaboration with the @unchained team, "Bitcoin And Quantum Computing." Read it here👇

Is quantum computing a risk to Bitcoin? @dpuellARK and @Unchained's @dhruvbansal and @tom_honzik dive into this question in a brand new white paper. Read here. ark-invest.com/white-papers/b…

Today we’re proud to share new research in collaboration with @ARKInvest: Bitcoin And Quantum Computing. In our view, quantum development will be a gradual progression—not a sudden event—giving markets and the bitcoin network time to adapt. Download ⤵️ unchained.com/go/bitcoin-and…

Blockstream Jade x @unchained 🤝 You can now use your fully open-source, Bitcoin-only @BlockstreamJade as a key within Unchained’s collaborative custody vaults.

The @BlockstreamJade is now compatible with Unchained vaults! Use the hardware wallets you already trust, secured through collaborative custody.

Today, the 20,000,000th bitcoin was mined. The remaining 1,000,000 BTC will be issued gradually over the next century. Bitcoin is permissionless, perfectly scarce money with an immutable monetary policy and a 17-year history. It’s catching on.

To celebrate 20M, we are offering 20% off a concierge onboarding to an Unchained vault! There are less than 1 million bitcoin left. Still on the sidelines? It might make sense to get some. Use promo code: 20MILLION

The future supply of bitcoin is more certain than the future supply of anything else.

To celebrate we are offering 20% off a concierge onboarding to an Unchained vault! There are less than 1 million bitcoin left. Still on the sidelines? It might make sense to get some. Use promo code: 20MILLION

The 20 millionth bitcoin being mined isn’t just a cool milestone, it proves why bitcoin is the most reliable asset in existence. Read more in our article reflecting on this event: unchained.com/blog/predictab…