Will Quantum Computing Suppress Bitcoin Prices In 2026? Grayscale Answers

Quantum risk has been getting louder in the Bitcoin conversation over the past few months. The question is whether that noise translates into price pressure in 2026.

Grayscale’s answer, in its updated 2026 Digital Asset Outlook: “Dawn of the Institutional Era” (last updated Dec. 15), is essentially no. Quantum belongs on the risk register and in the research pipeline, not on the list of themes the firm expects to steer Bitcoin’s valuation next year. In its view, it’s not “likely to move prices” in 2026.

Why The Quantum Computer Threat Won’t Move Bitcoin Price In 2026

That call matters because the quantum debate arrived while the market is already looking for new failure modes — everything from “the four-year cycle is dead” to renewed anxiety about large holders distributing supply. Grayscale’s framing is simpler: the threat is real in theory, but the relevant timelines don’t line up with a 2026 trading horizon.

The firm lays out the core concern in plain terms: “Theoretically, a sufficiently powerful quantum computer could derive private keys from public keys, which could then be used to create valid digital signatures to spend users’ coins. Therefore, Bitcoin and most other blockchains — and virtually everything else in the economy that uses cryptography — will eventually need to be updated for post-quantum tools.”

The key word is eventually. Grayscale points to expert estimates suggesting a machine capable of breaking Bitcoin’s cryptography is “unlikely before 2030 at the earliest.” That pushes 2026 into a preparedness bucket: more research, more coordination, more work on mitigation — but not a year where markets suddenly apply a quantum discount because a lab headline hit the wires.

Grayscale makes that explicit. “However, expert estimates suggest a quantum computer powerful enough to break Bitcoin’s cryptography is unlikely before 2030 at the earliest. Research on quantum risk and community preparedness efforts will likely accelerate in 2026, but this theme is unlikely to move prices, in our view,” the firm writes.

In the report’s taxonomy, quantum sits closer to “high attention, low near-term impact” than to a true 2026 catalyst. Grayscale groups it with other heavily discussed trades that may not drive returns on a one-year view, including the digital-asset-treasury (DAT) narrative that had its Michael Saylor copycat phase in 2025.

The broader outlook is firmly “institutional era” in tone. Grayscale expects 2026 to extend structural shifts in how digital assets are owned and allocated, driven by macro demand for alternative stores of value and an improving regulatory backdrop that reduces frictions for large investors. In that context, the firm is calling for Bitcoin to set a new all-time high in the first half of 2026, while arguing the classic four-year halving cycle is becoming less dominant as spot ETPs and slower-moving portfolio allocation play a bigger role.

That’s also why quantum looks like a mismatch for the 2026 price question. If the marginal buyer is an allocator working through due diligence checklists, the market’s response function changes. Those investors do not ignore tail risks — but they also tend not to liquidate positions on long-dated, low-probability scenarios unless the timeline becomes immediate.

Grayscale highlights one other, quieter point that fits the institutional framing: Bitcoin’s supply schedule. The report notes investors can be “highly confident” the 20 millionth bitcoin will be mined in March 2026 — a predictable, verifiable milestone that speaks to the protocol’s rule-based issuance.

So will quantum computing suppress Bitcoin in 2026? Grayscale’s base case is no — not because the problem is imaginary, but because it isn’t close on the timeline markets usually need before they reprice risk. For next year, the firm expects the bigger drivers to look familiar, even if they arrive in more institutional packaging: rates, regulation, ETP plumbing, and steady absorption of BTC into mainstream portfolios.

Quantum remains a theme to track. Just not, in Grayscale’s view, the theme that sets the price in 2026.

At press time, Bitcoin traded at $87,184.