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BITCOIN

Google's quantum warning sets off urgent bitcoin protocol debate

Tuesday, April 7, 2026 · from 5 podcasts, 6 episodes
Bitcoin Takeover PodcastBanklessStacker News LiveTFTC: A Bitcoin PodcastPresidio Bitcoin JamBankless
  • New research from Google shrinks hardware estimates for breaking Bitcoin's encryption, setting a potential 2029 deadline for migration.
  • Bitcoin's governance crisis leaves it unable to coordinate a response, while developers warn against rushed, dangerous upgrades.
  • Institutional custodians may force a fork to burn Satoshi's vulnerable coins, sacrificing immutability for market stability.

The timeline for a quantum computing attack on Bitcoin has been slashed. Research from Google and Caltech indicates a 20x improvement to Shor's algorithm, suggesting a cryptographically relevant quantum machine might need as few as 500,000 physical qubits. The current best machines have around 1,500. This doesn't break Bitcoin today, but it moves the goalpost for a necessary protocol upgrade.

On Bankless, Nic Carter framed this as an existential governance test. The threat is not a slow leak but an "on-spend" attack, where a transaction could be hijacked in the nine minutes it sits in the mempool. Bitcoin's defense mechanism - its extreme resistance to change - now looks like a liability. Carter argues there is no mechanism for the "total mobilization" a post-quantum migration requires.

Nic Carter, Bankless:

- Bitcoin governance is built for peacetime.

- This 'immune system' is now a liability.

In contrast, Brandon Black on TFTC dismissed the panic as premature by decades. He emphasized the monumental, unsolved engineering challenges of scaling quantum hardware, calling predictions of a near-term machine "a denial of the realities of building physical things." For Black, the greater risk is rushing an unproven cryptographic fix that could break foundational infrastructure like the Lightning Network and multisig.

The disagreement centers on whether to act on a warning or wait for proof. Carter and others on Bankless warn that waiting for a "live" attack is waiting for the end. Google has accelerated its internal post-quantum transition timeline to 2029. The U.S. government targets 2030-2035 for its critical functions.

If the Bitcoin community cannot coordinate, major custodians might. Carter predicts the top 20 institutional holders like BlackRock and Coinbase could dictate a canonical fork to burn the roughly 2.3 million Bitcoin in vulnerable addresses, including Satoshi's stash. Their fiduciary duty to protect client assets would override the network's property rights dogma.

Brandon Black, TFTC:

- Bitcoin can't be subject to change without evidence that it needs to.

- If we can be caused to make a change based on claims and not evidence, then Bitcoin is vulnerable to the most obvious of attacks.

Parallel work on protocol upgrades like Blockstream's Simplicity shows a longer-term path. Simplicity, now live on Liquid, replaces Bitcoin's ad-hoc Script with a formally verified system. Andrew Poelstra sees it as a project for the 2030s, a way to safely introduce new capabilities like covenants. This methodical engineering stands in stark contrast to the emergency response a quantum breach would demand.

The core tension is now explicit. Bitcoin must navigate between the Scylla of a catastrophic hardware breakthrough and the Charybdis of a destabilizing, panicked software fork. Its survival hinges on whether its decentralized culture can muster coordinated action against a threat it has never truly faced.

ProtocolBTC MarketsAdoption

By the Numbers

  • 2010Year Satoshi disabled problematic opcodesmetric
  • 520 bytesCurrent Bitcoin Script element size limitmetric
  • 32-bitArithmetic limit in Bitcoin Scriptmetric
  • 9 minutesTime to crack a key for on-spend attackmetric
  • 2029Google's post-quantum transition deadlinemetric
  • 2030-2035U.S. government post-quantum transition windowmetric

Entities Mentioned

0xchatProduct
BasecampProduct
BLOCKSPACESCompany
BlockstreamCompany
BuilderBotConcept
Cash AppProduct
DeepSeekCompany
Drift ProtocolProduct
Ethereum FoundationCompany
Google AntigravityProduct
LiquidConcept
MoneroProtocol
New York TimesCompany
OpenAgentsplatform
OpenAItrending
PolymarketCompany
ShrimpsProduct
SimplicityConcept
SpaceXCompany
SpiralCompany
SquareCompany
Stacker NewsProduct
SynthesiaCompany
TBPNCompany
ZcashProtocol

Source Intelligence

What each podcast actually said

Bitcoin Takeover Podcast
Bitcoin Takeover Podcast

S17 E17: Lukas Hozda on BIP110, Bitcoin & Rust • Apr 7

  • Blockstream's Simplicity is now live on the Liquid production network, marking a major milestone. Simplicity is a low-level, formalized programming language designed for consensus validators, not human programmers.
  • Andrew Poelstra describes Simplicity HL as the high-level language for developers, designed to compile down to Simplicity with a syntax explicitly modeled on Rust. The goal is to feel like writing Rust code for blockchain contracts.
  • Simplicity enables arbitrary computation and transaction introspection, which allows for covenants. This is a fundamental expansion beyond Bitcoin Script's current capabilities of signature checks, hash pre-images, and timelocks.
  • Poelstra argues Bitcoin Script is both inexpressive and full of unpredictable quirks, citing weird edge cases in numeric opcodes, timelock calculations, and the legacy of ad-hoc bug fixes from 2010 that crippled its original functionality.
  • A key advantage of Simplicity is its formal specification and multiple provably correct implementations. This contrasts with Bitcoin Script, where writing a new interpreter is culturally forbidden due to undefined edge-case behavior.
  • Poelstra sees Simplicity's primary short-term use in solving narrow technical problems Bitcoin faces today, like fee-bumping delegations or complex multi-signature policies, rather than immediately replicating Ethereum-style DeFi.
  • He states Simplicity is designed to retain Bitcoin's core fee model where transaction size is the primary cost. It uses a jetting system to optimize common operations like SHA-256, avoiding Ethereum's problem of wildly variable gas costs per opcode.
  • On drivechains, Poelstra remains unconvinced, citing the P+Epsilon attack and inherent incentive problems where the value secured could incentivize miners to attempt deep reorgs, creating systemic instability.
  • When asked about interesting altcoins, Poelstra names Monero and Zcash for privacy tech, Sia for its file storage model, and Grin for Mimblewimble. He distinguishes these from scams by their lack of ICOs and sincere technical goals.
  • The Starkware team has built a STARK verifier using Simplicity, demonstrating its capability for complex zero-knowledge proof verification directly on a blockchain.
  • Poelstra views Simplicity as a long-term direction for Bitcoin script extension, potentially a project for the 2030s. It could serve as a formal specification layer for proposing and testing new opcodes like OP_CAT before they are added to Bitcoin.
ProtocolAdoptionBTC MarketsCustody
Bankless
Bankless

Bitcoin Has 3 Years to Survive | Nic Carter on Bitcoin’s Quantum Vulnerability • Apr 6

  • Bitcoin's governance is spectacularly unsuited to the quantum threat, which requires total mobilization for core infrastructural change under an uncertain timeline.
  • The Google and Oratomic papers published improved resource estimates for breaking Bitcoin's ECDSA cryptography, indicating the threat is closer than previously thought. The hardware does not yet exist.
  • A short-range 'on-spend' attack could intercept a Bitcoin transaction in as little as nine minutes using the improved algorithms, forcing the entire network to be post-quantum before the computer is built.
  • The authors of the Google paper suggest a fast takeoff model for quantum computing, where significant prior notice before a cryptographically relevant quantum computer exists is unlikely.
  • Google has accelerated its internal post-quantum transition timeline to 2029, while the U.S. government targets 2030-2035 for critical functions.
  • Transitioning Bitcoin to post-quantum cryptography is complex, requiring consensus on a signature scheme, a coordinated migration of all addresses, and a decision on dormant coins.
  • Post-quantum signature schemes are much larger than current ones, requiring a likely uncontroversial block size increase to accommodate the 10x to 1000x increase in transaction data.
  • The Google paper estimates 6.9 million Bitcoin are vulnerable to long-range quantum attacks, with 2.3 million considered permanently unmovable Satoshi or lost coins.
  • Nic Carter predicts Bitcoin's largest custodians and exchanges will eventually demand a fork where the unmovable Satoshi coins are burned, establishing that as the canonical BTC.
  • Ethereum is seen as more proactive on the quantum threat, having a published roadmap and an advantage as it has not hyper-optimized around small signatures like some high-performance chains.

Also from this episode:

Regulation (1)
  • Carter's preferred solution uses salvage law, where a trusted entity recovers vulnerable coins and holds them in trust for their original owners, with a finder's fee, rather than protocol-level burning.
ProtocolCustodyETFs

ROLLUP: Google’s Quantum Warning | Trump’s Iran Speech | Ethereum Economic Zones | Drift Hack • Apr 3

  • Google released a 'quantum warning' specifically for the crypto industry, indicating an algorithmic breakthrough that could accelerate the cracking of ECDSA signatures underlying Bitcoin and Ethereum.
  • Google's research indicates a 20x improvement to Shor's algorithm, potentially reducing the physical qubits needed to crack ECDSA from tens of millions to 500,000.
  • With 500,000 physical qubits, a quantum computer could attack Bitcoin or Ethereum and extract keys in approximately nine minutes, enabling 'on-spend attacks' that intercept transactions.
  • Google recommends that all cryptocurrency communities migrate to post-quantum cryptography by 2029, a deadline they have adopted internally.
  • Bitcoin faces a significant challenge as 6.9 million BTC (one-third of total supply) is vulnerable to quantum attack, including 2.3 million BTC (10-15%) from Satoshi and lost keys.
  • Google's paper outlines four options for dormant Bitcoin: do nothing, burn them, implement an 'hourglass approach' to limit spend rates, or use a 'bad side chain' for ownership proofs.
  • Ethereum has a broader quantum attack surface than Bitcoin, encompassing data availability, KZG ceremony vulnerability, and quantum-exposed admin keys controlling $200 billion in stablecoins and RWAs.
  • Despite a larger attack surface, Ethereum's quantum challenge is 'compensated by stronger community leadership' and an existing roadmap, according to Google's assessment.
  • The Ethereum Economic Zone (EEZ) is a proposal by Nosis and Jordi Belina aiming for synchronous composability between Layer 2s and Layer 1, enabling shared liquidity and atomic transactions.
  • Aave v4 is live, transforming Aave into a 'single liquidity hub' with specialized 'spokes,' allowing anyone to launch a spoke with DAO approval, governed by Aave as the main risk manager.
  • Phantom wallet now allows U.S. users to fund with bank transfers or Apple Pay, send/receive wires, and offers a debit card, moving towards a 'money super app' model for self-custodial wallets.

Also from this episode:

Politics (2)
  • David argues that Trump's 19-minute speech on Operation Epic Fury, the Iran War, primarily served to inform markets that the conflict would continue for another 'two to three weeks.'
  • Polymarket suggests a 60% probability of U.S. forces entering Iran by April 30th and a 47% chance of a U.S.-Iran ceasefire by May 31st.
Business (9)
  • After Trump's speech, oil markets (Brent Crude, WTI futures) surged by 10-12%, while NASDAQ and S&P 500 futures initially dropped 0.5%, though the S&P later returned to pre-speech levels.
  • Fed Chair Jerome Powell stated that the U.S. national debt is growing 'substantially faster than our economy' and is on an 'unsustainable' path.
  • Polymarket indicates the possibility of a U.S. recession has risen from 20% to 36%, potentially influenced by rising energy costs impacting inflation.
  • Drift Protocol, a Solana perp Dex, suffered a $285 million exploit on April 1st, after an attacker social-engineered two of five multi-sig signers.
  • The Drift attacker minted and wash-traded a fake token for days to create perceived legitimacy, then used admin control to add it as collateral and withdraw other assets.
  • Hayden Adams (Uniswap) criticized Drift's admin setup, arguing that protocols with central keys capable of draining funds should not be called 'DeFi,' as it blurs the definition.
  • The Aave v4 model charges a higher risk premium for less secure collateral and uses credit lines set by the hub to constrain potential damage from individual spokes, mimicking a central banking structure.
  • Benji Taylor, a crypto wallet builder previously at Aave and Base, has joined X, signaling the company's intention to develop a crypto wallet within its 'money super app.'
  • SpaceX is targeting a June IPO with a projected valuation of $1.75 trillion, illustrating a trend where most company growth and upside are captured privately before public listing.
AI & Tech (1)
  • OpenAI recently closed a $122 billion funding round, valuing the company at nearly $900 billion, driven by rapid growth including $2 billion in monthly revenue.
ProtocolBTC MarketsMacroRegulation
Stacker News Live
Stacker News Live

SNL #218: Where you sitting...Good Friday • Apr 6

  • Stacker News, a Bitcoin front page platform, features `txrush.com` and `truckyard.live` which visualize Bitcoin mempool transactions as highway traffic or spacecraft, pulling data from the mempool. Carl suggested these could be useful as phone widgets.
  • The Unboiled family, who live nomadically and attempt to transact predominantly in Bitcoin, tracks 'SATs inflation' based on their spending on essentials in South Africa. They reported a period of 'SATs deflation' where costs were lower by 11% for electricity, 8% for fuel, and 5% for milk.
  • Siru's Bitcoin data project investigated Foundry's 7-consecutive-block streak, which occurred alongside a two-block reorg. The analysis, using data from the BOK project and Wumbo's node archives, suggests consecutive blocks happen more frequently than expected due to block latency, where co-located miners receive block headers faster.
  • Bitprojects.io demonstrated that Bitcoin node count can be easily 'sybillable' by simulating over 3,000 nodes using minimal hardware. The project aimed to show that node count is an unreliable metric for social consensus or soft fork signaling, with its shutdown causing a 'huge uptick' in incoming connections for other nodes.
  • Recent quantum computing breakthroughs, including Caltech's advancements in quantum operations and Google's implementation of Shor's algorithm with an order of magnitude fewer qubits, do not fundamentally alter the timeline for breaking elliptic curve cryptography. Scott Aaronson, an independent expert, suggests they might slightly shorten the indeterminate timeline, which could still be 5-10 years or longer.
  • Supratic outlined several privacy attacks on Lightning, emphasizing that blinded paths improve privacy but are not a 'magic shield' against tracing. These attacks include CLTV correlation, graph analysis on small nodes, payment probing, introduction, and node visibility.

Also from this episode:

AI & Tech (4)
  • The New York Times is blocking the Internet Archive from archiving its articles, citing protection against AI scraping. Keon argues this strategy, while aiming for short-term subscriber growth, will harm the NYT's long-term relevance by excluding its content from AI training data and future search results.
  • OpenAI acquired the popular podcast network TBPN, with CEO Sam Altman stating it was due to liking the show and not for promotional purposes. Keon speculates the acquisition might instead aim to subtly shape tech narratives favorable to OpenAI, similar to the Bezos-Washington Post acquisition.
  • Japanese and US companies formed the Portsmouth Consortium under a strategic trade agreement to develop AI infrastructure and power generation in Piketon, Ohio. The project plans to invest $500 billion to build a data center with a 9.2 GW capacity, leading Blockchain Boo to predict potential government bailouts given the scale of the AI race.
  • Carl and Keon debate the implications of free and abundant intelligence, with Keon suggesting it will only shift humanity's bottlenecks rather than solving all problems. Carl argues that with intelligence addressed, humanity's focus would shift to virtues, love, and internal well-being, aspects that artificial intelligence cannot fulfill.
BTC MarketsProtocolBig TechEnergyMacro
TFTC: A Bitcoin Podcast
TFTC: A Bitcoin Podcast

Marty Bent

#733: The Truth About The Quantum Threat with Brandon Black • Apr 4

  • Brandon Black predicts quantum computers are 50 to 100 years or more from breaking a meaningful cryptographic system.
  • Black says scaling up quantum computers involves immense physical difficulty that is dramatically underplayed by proponents.
  • He states quantum research has seen new difficulty emerge every time they try to scale for the last four decades.
  • Black says we need to see a single quantum architecture successfully double its logical qubits multiple times before taking the scaling threat seriously.
  • Pro-quantum advocates derive confidence from impressive theoretical wins by brilliant researchers, not from physical scaling evidence.
  • A recent Google paper presented a mathematical improvement that reduces the logical qubits needed for Shor's algorithm.
  • Black says the Google result still leaves quantum computing six to nine orders of magnitude away from a cryptographically relevant device.
  • He notes hype around tiny physical improvements in quantum papers indicates the field is still far from a breakthrough.
  • Rushing a quantum-resistant upgrade for Bitcoin risks disrupting existing infrastructure like Lightning and multisig.
  • Black argues elliptic curve cryptography will likely fail someday, so Bitcoin should develop a suitable replacement at a measured pace.
  • Black says the Bitcoin developer community is actively researching post-quantum cryptography, contrary to claims of inaction.
  • He states Bitcoin's decentralized nature makes cryptographic changes far riskier and costlier than for centralized systems.
  • Black says Jonas Nick's Shrimps advance makes Shrinks Plus more compatible with Bitcoin's wallet recovery model.
  • He is hesitant to put current post-quantum systems into Bitcoin due to large signature sizes and incompatibility with wallet infrastructure.
  • Hash-based signatures are the current near-term consensus for post-quantum Bitcoin because they rely on trusted assumptions.
  • Lattice-based cryptography offers benefits but relies on newer, less battle-tested mathematical assumptions.
  • During NIST standardization, two of 69 post-quantum candidate algorithms were broken by classical computers.
  • Isogeny-based cryptography is a promising post-quantum avenue as it is elliptic curve based and only doubles on-chain size.
  • Black argues quantum fear distracts from and could stall development of useful Bitcoin innovations like Silent Payments and Musig.
ProtocolAdoption
Presidio Bitcoin Jam
Presidio Bitcoin Jam

Google's Quantum Warning Overblown?, OpenAI Acquires TBPN, Jack Dorsey Makes Block Mini-AGI • Apr 3

  • Google's quantum cryptography paper claims a 20x performance improvement in algorithms to break elliptic curve signatures used by Bitcoin.
  • Steve Lee argues quantum computing progress should be framed as N minus 1, where N is years until cryptographically relevant quantum computers exist.
  • Lee says the quantum threat is harder for Bitcoin due to the need for decentralized consensus, Satoshi's potentially exposed coins, and blockchain cost sensitivity.
  • Blockstream's Shrinks quantum-resistant signature scheme produces 354-byte signatures, about 5x larger than current Schnorr signatures, but requires stateful management.
  • Blockstream's Shrimps scheme creates stateless 2500-byte signatures for recovery scenarios, trading larger size for no required off-chain data.
  • Lee says Bitcoin's anti-fragility means it could survive a price crash from a quantum emergency, similar to Mt. Gox, and recover long-term.
  • Square's rollout of Bitcoin Lightning payments faces hurdles: sellers must manually update software, not all hardware supports it, and tipping flows are incompatible.
  • David Marcus notes Cash App's Bitcoin Lightning payments save merchants credit card fees, with 1 in 10 Cash App users holding Bitcoin versus 60 million total active users.
  • Max Hillebrand says peer-to-peer AI compute networks like Mesh LLM and OpenAgents are gaining traction, but lack payment mechanisms and computation verifiability.

Also from this episode:

AI & Tech (6)
  • Spiral surveyed 50 developers and grantees on AI usage, creating archetype-based reports from non-developers to low-level protocol coders.
  • OpenAI acquired The Big Podcast Network for an estimated $100 million, seen as a strategic move to control its own media channel amid competition.
  • Max Hillebrand argues America needs a 'DeepSeek moment' - a competitive open-source AI model - as Chinese models surge ahead and Llama's progress stalled.
  • Block's 'Hierarchy to Intelligence' vision restructures the company around AI agents handling internal information flow, with people as orchestrators.
  • Block's internal BuilderBot AI, integrated into Slack, allows employees to query company data, generate SQL, and get recommended contacts for verification.
  • A creator used AI tools for GLP-1 lead generation, reportedly generating $418 million in revenue within 18 months with minimal staff.
Business (1)
  • Steve Lee says Block's new org structure has three roles: Individual Contributor, Directly Responsible Individual, and Player-Coach, eliminating traditional middle management.
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