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On March 31, Google’s Quantum AI research team published a white paper arguing that future quantum computers could crack the cryptography protecting Bitcoin wallets using far fewer resources than previously estimated, and that such machines may arrive sooner than markets have priced in. No quantum computer capable of this attack exists today, but the potential impact would be existential for Bitcoin.
The research suggests that the cryptography securing Bitcoin wallets could be broken by a quantum computer using roughly 20 times fewer physical qubits than earlier estimates.
If the refined attack works as described, a quantum machine could crack Bitcoin’s encryption in about 9 minutes. Bitcoin settles a newly mined block every 10 minutes, meaning an attacker could theoretically intercept transactions in progress and reroute them, potentially to their own wallet. If this were confirmed, it would likely trigger a rapid loss of confidence and a major price decline.
Zcash (ZEC) forked from Bitcoin’s codebase in 2016. It follows the same 21 million-coin supply cap, uses proof-of-work (PoW) mining, and follows a halving schedule aligned with Bitcoin’s four-year cycle. By design, it adds optional privacy features that allow transactions without broadcasting full details.
On the quantum front, the white paper highlights a structural advantage: Zcash’s 75-second block time. The shorter interval is described as making transaction-interception-style quantum attacks less viable than they would be against Bitcoin’s 10-minute block settlement cadence.
The paper’s implications for quantum security are meaningful for Zcash, but they are not presented as a standalone reason to buy ZEC immediately, nor as a reason to sell Bitcoin in favor of Zcash.
Bitcoin’s network effects, liquidity, and institutional adoption are described as far ahead, making it less likely that a single vulnerability would dislodge it. The more Bitcoin appears exposed relative to quantum capabilities, the more its large holders—many of which are financial institutions—could push for adaptations to mitigate the risk.
Even with the new research, quantum computers are still characterized as an emerging technology that is not expected to be capable of attacking cryptocurrencies for years.
Overall, Zcash is described as a worthwhile asset to hold within a crypto portfolio and as likely to become quantum-resistant before Bitcoin. However, it is also characterized as less established than Bitcoin and as carrying more risk, particularly given the niche technical domain involved.
Premium gym chains are entering a “golden era” that is ending or already in decline, as rising operating costs collide with shifting consumer preferences toward more flexible, community-based ways to exercise. Long-term memberships are shrinking, margins are pressured by higher rents and facility expenses, and competition from smaller, more personalized…
