# Bitcoin quantum-resistant upgrade implemented in 2026? 30 dated claims from 9 publishers are collected below, each with its source. 0 point toward YES and 5 against it; the rest are context. The research behind this brief is dated 10 November 2026. No direction or probability is published here: the claims and their sources are the brief. - Canonical page: https://market-claims.com/briefs/bitcoin-quantum-resistant-upgrade-implemented-in-2026-5439e324 - Category: crypto - Evidence collected: 10 November 2026 - Research dated: 10 November 2026 - Published: 10 November 2026 - Market: Polymarket, https://polymarket.com/event/bitcoin-quantum-resistant-upgrade-implemented-in-2026 - Venue YES price: 5.5c at 10 November 2026 - Market closes: 1 January 2027 Research only. Not financial advice. No trades are placed. The price is the venue's own market price at the snapshot time, shown as context only. It is not an estimate by MarketClaims. ## The question, as the venue words it Bitcoin quantum-resistant upgrade implemented in 2026? ## How this market settles This market will resolve to “Yes” if, by December 31, 2026, 11:59 PM ET, a quantum-resistant protocol upgrade is activated on the Bitcoin mainnet. Otherwise, this market will resolve to “No.” To qualify, the upgrade must satisfy all of the following: - The upgrade must constitute a consensus-layer change to the Bitcoin protocol that is live and enforced on the Bitcoin mainnet by the deadline. Proposals, drafts, code releases, miner signaling, node adoption, or activation on testnets or alternative networks do not qualify on their own. - The upgrade must enable the use of a post-quantum-secure signature scheme for standard Bitcoin transactions on the Bitcoin mainnet. The scheme must be intended to provide meaningful resistance against quantum attacks on transaction signing (e.g., attacks against ECDSA or successor schemes). Purely theoretical proposals, wallet-level changes, off-chain solutions, layer-2 systems, or other non-consensus-layer mitigations do not qualify. - The upgrade must make such quantum-resistant transaction types valid under Bitcoin consensus rules and generally available for use on the Bitcoin mainnet, even if their use is optional or not yet widely adopted. “Activated” means the upgrade has reached the point at which its rules are enforced on Bitcoin mainnet blocks under consensus rules, following any required activation thresholds or lock-in periods. The resolution source will be a consensus of credible reporting. ## Evidence you can inspect _These labels describe how a claim relates to the question. They are not recommendations or independent votes._ ### Evidence supporting YES (0 claims) _No claims in this category. Absence here is a coverage limit, not a finding._ ### Evidence challenging YES (5 claims) - "The first concept, called 'Quantum Landmines,' would allow Bitcoin owners to attach a cryptographic proof to a small, quantum-resistant output before quantum computers can break existing cryptography" [klamm.de](https://www.klamm.de/news/bitcoin-entwickler-schlaegt-schutzmassnahmen-gegen-quantenangriffe-vor-76n05468ab.html), published 6 November 2026 - "Cory Fields proposed a staking auction mechanism for dormant coins where anyone can lock up quantum-resistant Bitcoin and bid on a vulnerable old wallet, with successful challengers claiming a portion of the hacker's collateral" [KuCoin](https://www.kucoin.com/news/flash/bitcoin-developer-proposes-quantum-landmine-to-deter-future-quantum-hacks), published 9 November 2026 - "Bitcoin developer Cory Fields has proposed a game-theoretic defense mechanism called "Quantum Landmine" to protect Bitcoin from quantum attacks" [KuCoin](https://www.kucoin.com/news/flash/bitcoin-developer-proposes-quantum-landmine-to-deter-future-quantum-hacks), published 9 November 2026 - "The "Quantum Landmine" system requires hackers to stake anti-quantum Bitcoin as collateral before attempting to steal funds" [KuCoin](https://www.kucoin.com/news/flash/bitcoin-developer-proposes-quantum-landmine-to-deter-future-quantum-hacks), published 9 November 2026 - "In the proposed system, if a hacker uses a quantum computer to derive an old private key and attempts to transfer funds, they must first lock up collateral from their quantum-resistant wallet" [KuCoin](https://www.kucoin.com/news/flash/bitcoin-developer-proposes-quantum-landmine-to-deter-future-quantum-hacks), published 9 November 2026 ### Context (25 claims) - "Attendees will learn two simple practices: using different manufacturers for their keys and performing a pre-tested recovery" [bitcoin.fr](https://bitcoin.fr/bitcoin-meetup-a-lausanne-16/), published 9 November 2026 - "No technical knowledge is required for the event, and beginner questions are welcome" [bitcoin.fr](https://bitcoin.fr/bitcoin-meetup-a-lausanne-16/), published 9 November 2026 - "The Bitcoin Amsterdam 2026 conference program includes over 60 speeches, panel discussions, practical sessions, and expert talks across multiple stages" [InternetUA](http://internetua.com/u-niderlandah-startuvala-bitcoin-amsterdam-2026-pro-sxo-govoryat-ucsasniki-na-tli-padinnya-bitkoyina), published 6 November 2026 - "Journalists from the Dutch publication Block #9 observed that the exhibition area at Bitcoin Amsterdam 2026 appeared quieter on the morning of November 5th, with fewer visitors and commercial stands compared to the previous year" [InternetUA](http://internetua.com/u-niderlandah-startuvala-bitcoin-amsterdam-2026-pro-sxo-govoryat-ucsasniki-na-tli-padinnya-bitkoyina), published 6 November 2026 - "Discussions at Bitcoin Amsterdam 2026 cover topics such as financial independence, government regulation, privacy protection, and competition for investment capital" [InternetUA](http://internetua.com/u-niderlandah-startuvala-bitcoin-amsterdam-2026-pro-sxo-govoryat-ucsasniki-na-tli-padinnya-bitkoyina), published 6 November 2026 - "Bitcoin Amsterdam 2026, an international conference described by organizers as Europe's largest Bitcoin event, commenced in the Netherlands on November 5th" [InternetUA](http://internetua.com/u-niderlandah-startuvala-bitcoin-amsterdam-2026-pro-sxo-govoryat-ucsasniki-na-tli-padinnya-bitkoyina), published 6 November 2026 - "The time lock is a condition written into Bitcoin's rules that makes a spend impossible before a specific date or before a predetermined time has elapsed" [bitcoin.fr](https://bitcoin.fr/bitcoin-meetup-a-lausanne-16/), published 9 November 2026 - "A separate Bitcoin for Corporations Symposium was scheduled for November 4th at Pakhuis de Zwijger, focusing on corporate reserves, MiCA regulations, and institutional investments" [InternetUA](http://internetua.com/u-niderlandah-startuvala-bitcoin-amsterdam-2026-pro-sxo-govoryat-ucsasniki-na-tli-padinnya-bitkoyina), published 6 November 2026 - "Bitcoin Core developer Cory Fields outlined a hypothetical rule requiring collateral for legacy Bitcoin (BTC) spends after a future "q-day" and activation of new validation rules" [TokenPost](https://www.tokenpost.com/news/technology/50981), published 7 November 2026 - "Bitcoin's price is roughly $22,964 lower than it was at this time last year" [Fortune](https://fortune.com/article/price-of-bitcoin-11-04-2026/), published 4 November 2026 - "Bitcoin has a market capitalization of approximately $1.33 trillion" [Fortune](https://fortune.com/article/price-of-bitcoin-11-04-2026/), published 4 November 2026 - "Over the past decade, Bitcoin's value has increased by more than 15,000%" [Fortune](https://fortune.com/article/price-of-bitcoin-11-04-2026/), published 4 November 2026 - "By the end of 2025, Bitcoin's price was about 30% below the record high it had reached a few months prior" [Fortune](https://fortune.com/article/price-of-bitcoin-11-04-2026/), published 4 November 2026 - "As of 7 a.m. Eastern Time today, one Bitcoin (BTC) is priced at $78,520.27" [Fortune](https://fortune.com/article/price-of-bitcoin-11-04-2026/), published 4 November 2026 - "Bitcoin's price is up $1,524.87 from yesterday morning" [Fortune](https://fortune.com/article/price-of-bitcoin-11-04-2026/), published 4 November 2026 - "Bitcoin's security relies on public-key cryptography, where a powerful quantum computer could potentially derive a private key from an exposed public key" [TradingView](https://www.tradingview.com/news/cryptobriefing:01bc08bd9094b:0-cory-fields-proposes-quantum-landmines-to-deter-bitcoin-theft/), published 6 November 2026 - "In 2009, Laszlo Hanyecz paid 10,000 Bitcoins for pizza, which would be valued at over $668 million today" [Fortune](https://fortune.com/article/price-of-bitcoin-11-04-2026/), published 4 November 2026 - "BIP-54, nicknamed the "Great Consensus Cleanup," aims to eliminate four known historical vulnerabilities in the Bitcoin network" [Viral Mag - Votre source d'actualités](https://viralmag.fr/bip-54-bitcoin-le-nettoyage-qui-change-tout/), published 5 November 2026 - "Matt Corallo estimates an 80% chance that BIP-54 will become the next soft fork of Bitcoin" [Viral Mag - Votre source d'actualités](https://viralmag.fr/bip-54-bitcoin-le-nettoyage-qui-change-tout/), published 5 November 2026 - "Antoine Poinsot, a co-author of BIP-54, helped formalize the document, which achieved full specification status in May 2026" [Viral Mag - Votre source d'actualités](https://viralmag.fr/bip-54-bitcoin-le-nettoyage-qui-change-tout/), published 5 November 2026 - "The proposals aim to prevent future theft through financial incentives, time limits, and auction mechanisms" [klamm.de](https://www.klamm.de/news/bitcoin-entwickler-schlaegt-schutzmassnahmen-gegen-quantenangriffe-vor-76n05468ab.html), published 6 November 2026 - "Fields' concept requires that before an attacker attempts to access a vulnerable wallet, they must deposit a certain amount of Bitcoin as a deposit" [Krypto News Aktuell Deutsch](https://news-krypto.de/krypto-news/diese-idee-eines-bitcoin-entwicklers-wuerde-quantenangriffe-unrentabel-machen/), published 9 November 2026 - "Quantum computers are considered a significant threat to current cryptography standards" [Krypto News Aktuell Deutsch](https://news-krypto.de/krypto-news/diese-idee-eines-bitcoin-entwicklers-wuerde-quantenangriffe-unrentabel-machen/), published 9 November 2026 - "Bitcoin technology, which is based on certain cryptographic algorithms, could thus become vulnerable if this technology is realized" [Krypto News Aktuell Deutsch](https://news-krypto.de/krypto-news/diese-idee-eines-bitcoin-entwicklers-wuerde-quantenangriffe-unrentabel-machen/), published 9 November 2026 - "Cory Fields, a developer in the Bitcoin community, has proposed an innovative approach to make it more difficult for future quantum attackers to break encryption" [Krypto News Aktuell Deutsch](https://news-krypto.de/krypto-news/diese-idee-eines-bitcoin-entwicklers-wuerde-quantenangriffe-unrentabel-machen/), published 9 November 2026 ## What this brief cannot settle This brief was assembled automatically from a research report that met a published quality bar. No individual review. It rests on 30 claims from 9 publishers; anything not reported in those sources is not represented here. The report recorded 6 resolution risks, listed with this brief. - Resolution source is defined as 'a consensus of credible reporting,' which is subjective and undefined — no specific authoritative sources (e.g., Bitcoin Core releases, specific news outlets) are named, leaving room for dispute about what constitutes credible consensus. - The term 'meaningful resistance against quantum attacks' is subjective and could be disputed if a proposed scheme is contested in the cryptographic community as insufficiently quantum-resistant. - The phrase 'generally available for use on the Bitcoin mainnet' lacks a precise technical definition — it is unclear what threshold of availability satisfies this condition. - 'Standard Bitcoin transactions' is not precisely defined, potentially creating ambiguity about whether a new transaction type counts as 'standard.' - No specific BIP number or upgrade mechanism is referenced, so evaluators must judge whether any given upgrade qualifies based on the criteria, introducing interpretation risk. - Timezone boundary: 'December 31, 2026, 11:59 PM ET' maps to 2027-01-01T04:59:00Z, which matches the end date, but ET daylight saving ambiguity (EST vs EDT) could affect exact cutoff though December 31 would be EST (UTC-5), so this appears consistent. ## Publication history - Published 10 November 2026; research dated 10 November 2026. ## Since the previous brief This is the first published brief for this event. No comparison is available. --- The same research can be run on any Polymarket or Kalshi market at https://market-claims.com.