Pandl also argued Bitcoin’s design reduces relative quantum risk versus other cryptocurrencies. He pointed to Bitcoin’s UTXO model and proof-of-work consensus, the lack of native smart contracts, and the fact that certain address types are not quantum vulnerable.

The Flashpoint Supply Bucket: ~1.7M BTC in Early P2PK (Including Satoshi’s Estimate)

Pandl highlighted roughly 1.7 million BTC locked in early P2PK outputs as the focal point, including Satoshi’s estimated 1 million BTC stash, described as worth about $68 billion at the time referenced.

This is where the quantum discussion turns into market structure. If quantum capability ever made older public-key-exposed outputs spendable, the market would have to price not just security remediation but the distributional question of whether that dormant supply should be allowed to move.

Pandl outlined three options for coins with lost or inaccessible private keys: burn the coins, deliberately slow their release by limiting the rate of spending from vulnerable addresses, or do nothing. Any credible move toward “burn” or “throttle” would directly touch long-run supply expectations, even if the near-term security posture remains unchanged.

He also stressed why this is politically hard. “All are conceptually doable, but the challenge is reaching a decision, and the Bitcoin community has a history of contentious debates over protocol changes, including last year’s dispute around image data stored in blocks.” He cited the 2023 conflict over Bitcoin Ordinals and blockspace usage as a reminder that technical questions can become entrenched governance fights.

Signals Traders Can Track: Post-Quantum Moves Across Chains and Bitcoin’s Next Steps

The cleanest forward signal is whether Bitcoin developer channels and formal Bitcoin Improvement Proposal discussions begin to explicitly address quantum-vulnerable or lost-key coins, including burn versus throttling versus do-nothing frameworks.

Traders can also watch for follow-through from Grayscale and other research desks that tightens the definition behind the “~1.7M BTC” figure, including criteria for what counts as quantum vulnerable and how that exposure is measured.

Outside Bitcoin, Pandl wrote that Solana and the XRP Ledger are already experimenting with post-quantum cryptography, and that the Ethereum Foundation released a post-quantum roadmap in February. More detail on those efforts, and any additional primary-source publication clarifying Google’s March 30 methodology, would shape how quickly this narrative moves from abstract tail risk to concrete roadmap risk.

Marcus Hale’s Take: The Tail Risk Isn’t ‘Quantum’—It’s the Politics of Dormant Supply

I don’t see this as a countdown to a sudden Bitcoin security event, because Pandl is explicit that there is “no security threat to public blockchains from quantum computers today.” The setup that matters is governance. Once the conversation centers on ~1.7M BTC in early P2PK outputs, the market is no longer debating cryptography in the abstract. It is debating whether a chunk of supply gets effectively written off, rate-limited, or left untouched.

The threshold that matters is whether this migrates into concrete BIP-level language about handling vulnerable or lost-key coins. If that happens, the setup starts to look structural rather than narrative-driven, because it forces a repricing of long-horizon supply expectations and the politics of who wins and loses from any rule change.

Sources

• Cointelegraph