Europe's top financial regulators just put quantum computing on their official list of threats to markets, warning that Bitcoin's encryption could fail before quantum computers are even good enough to sell.
On September 23, the European Banking Authority, the European Securities and Markets Authority and the European Insurance and Occupational Pensions Authority did something no financial regulator had done before. They didn't do it quietly, either. Working together as the EU's Joint Committee of European Supervisory Authorities, the three agencies added quantum computing to their official systemic risk map, alongside AI-driven cyber risk and private credit. The warning landed in their Autumn 2026 Risk and Vulnerabilities report. And it named a specific target: the elliptic-curve cryptography that secures every Bitcoin and Ethereum wallet in existence.
The regulators didn't hedge. Advanced quantum computers, they wrote, "could undermine some cryptography systems widely used to secure communications, transactions, databases and blockchains." Then came the line that should worry anyone holding crypto: the threat "could materialize earlier than any viable commercial application."
That's the part people miss. You don't need a working quantum computer for the danger to be real. Attackers can harvest encrypted blockchain data right now, park it, and wait. Security researchers call this "harvest now, decrypt later," and it means every public key ever exposed on a blockchain is a bet against the future, whether the wallet owner knows it or not.
The numbers behind that bet are large. Roughly 6.9 million Bitcoin, worth about $586 billion, sit in addresses whose public keys are already exposed on chain, according to CryptoQuant data reported by CoinDesk. Those are mostly older wallets, pay to public key addresses and reused addresses, the kind early adopters and long dormant holders never bothered to migrate. A quantum computer capable of breaking that encryption wouldn't need to touch newer, better protected wallets to do enormous damage.
Ethereum's 60% Q3 Rally Is Real, But Its Record High Isn't Close Ethereum posted its second-best third quarter on record, gaining more than 60% and pulling Bitcoin along for the ride, but the rally has left ETH about 47% below its August 2025 all-time high. ETF inflows, corporate treasury buying, and a Fed rate hike that markets shrugged off are driving the move. - ethereum Q3 rally 2026 cryptocurrency recovery - ethereum price recovery from May lows 2026
Not close, by the numbers that exist now. IBM's most advanced chips run around 1,000 physical qubits. Breaking Bitcoin's 256-bit elliptic-curve signatures was long estimated to require millions of stable, error-corrected qubits, a threshold nobody has hit. But the gap has been shrinking faster than expected. Google Quantum AI published research in March 2026, done with Stanford and the Ethereum Foundation, suggesting that cracking that same 256-bit encryption might need roughly 20 times fewer physical qubits than earlier estimates assumed, under certain hardware assumptions. IBM's own roadmap points to Starling, its fault-tolerant machine, arriving by 2029, not decades out. That's the timeline regulators are reacting to, not science fiction.
The race to get ahead of Q-Day #
Ethereum isn't waiting to find out who's right. The network has set a formal deadline of December 2029 to make its base layer quantum-resistant, a project that touches signature schemes across the entire protocol through a planned series of hard forks. Coinbase is building post-quantum custody infrastructure to protect the roughly $250 billion in institutional assets it holds for clients including BlackRock. Ripple is targeting a quantum-ready XRP Ledger by 2028 through a four-phase roadmap that includes a contingency plan for fund recovery if quantum threats arrive early. El Salvador, which holds Bitcoin as a national reserve asset, has already split its holdings across more wallets, moving thousands of coins into new addresses capped at 500 BTC each, specifically to reduce how much value sits behind any single exposed key.
Governments are moving too, and on a shorter clock than crypto's own roadmaps. The European Commission wants EU member states to begin national post-quantum migration strategies by the end of 2026, just months from now, with critical infrastructure fully protected by 2030. France's cybersecurity agency, ANSSI, plans to stop certifying non-quantum-resistant products starting in 2027. None of that is crypto-specific policy. It's a signal that European governments now treat quantum decryption as a near-term infrastructure risk, not a distant hypothetical, and blockchain wallets happen to sit squarely inside that blast radius.
Frankly, the uncomfortable part isn't the quantum computer that doesn't exist yet. It's the data that's already been copied. Nobody can audit how much encrypted blockchain traffic has been quietly harvested and stored by state actors or criminal groups over the past decade, waiting for the hardware to catch up. That's the whole point of the strategy: you don't need to win now if you're willing to wait.
For now, breaking a Bitcoin wallet with a quantum computer remains theoretical, and every serious estimate still puts a working machine years away. But three of Europe's most conservative financial regulators just decided that theoretical and years away were close enough to put on paper. That's not hype. That's a risk map, and Bitcoin is now officially on it. Also read: Joe Lonsdale Backs Robinhood Meme Coin Tied to Palantir Stock, It Jumps 600% • SEC Commissioner Mark Uyeda Vows Guardrails as Tokenized Stock Race Heats Up • Chainlink's Zach Rynes Calls XRP Ledger a Ghost Chain and Ripple Fires Back
X Turns Every Ticker in a Post Into a One Tap Trade Button X launched its U.S. Cashtag Partner Program on September 15, letting users tap any stock or crypto ticker to view a live chart and route directly into a trade at Coinbase, Kraken, Gemini, Interactive Brokers or Moomoo. The earlier, trade-free version of the feature had already driven an estimated $1 billion in global volume, and X never touches... - how to trade stocks directly from X posts - one tap trading integration with Coinbase and Kraken
This article is posted in Crypto News, check it out for more related stories.
Join the discussion #
Open in the community → Almost there. Sign in and your reply posts straight away.