SpaceX has shifted 1,308 BTC for the first time in three years, moving funds from 16 legacy addresses into a single SegWit wallet. Analysts say it may be UTXO consolidation rather than a sale.

Bitcoin is the first cryptocurrency built on blockchain technology, with a capped supply of 21 million coins. This article explains its origin, mining model, wallet types, buying methods and storage options, along with its broader market significance as digital gold.

IOSG argues that quantum computing is less a sudden “endgame” for crypto than a long-duration repricing of blockchain security assumptions. In its latest analysis, the firm frames Q-Day—the point when a fault-tolerant quantum computer gains practical power to break mainstream public-key cryptography—as a systemic deadline for Web3 infrastructure. The report says Shor’s algorithm could undermine the cryptographic trust roots of major public blockchains such as Bitcoin and Ethereum, both of which rely heavily on elliptic-curve cryptography. The bigger constraint, however, is not the absence of post-quantum cryptographic tools, but the difficulty of coordinating migration across protocols, wallets, custodians, exchanges, bridges, and governance structures. IOSG highlights that Bitcoin’s biggest challenge lies in exposed public keys, dormant UTXOs, and the political question of whether legacy coins should be frozen or left vulnerable. Ethereum, by contrast, faces a broader engineering challenge: replacing cryptographic assumptions across the execution layer, consensus layer, data availability stack, and parts of the ZK ecosystem. The report concludes that while the broader preparation period may span 5 to 15 years, the practical engineering comfort window could be only 5 to 8 years.

A MarsBit analysis argues that quantum computing is unlikely to erase blockchains overnight, but it could trigger a long, systemic rewrite of crypto security assumptions. The piece frames the main risk around “Q-Day,” the point at which a cryptographically relevant fault-tolerant quantum computer becomes capable of breaking mainstream public-key cryptography in practice. Current estimates place that window mostly around 2035–2045, with more aggressive scenarios suggesting 2030–2035. The report says the real issue is not the absence of post-quantum cryptography, but whether the crypto industry can coordinate migration before attacks become economically viable. Bitcoin’s challenge is concentrated in exposed public keys, dormant legacy UTXOs, signature bloat, and governance conflict over how to treat coins that never migrate. Ethereum, by contrast, faces a broader full-stack transition involving EOAs, validator signatures, KZG commitments, data availability, and parts of the ZK stack. The article concludes that post-quantum migration is fundamentally a coordination and governance problem, not a simple cryptographic swap. For markets, repricing may begin well before Q-Day itself if hardware roadmaps accelerate, resource estimates fall, or regulators and custodians start demanding PQC compliance.

A new analysis says about 7 million BTC, worth roughly $470 billion, could be theoretically exposed to future quantum attacks due to vulnerable address types and public key exposure. The threat is seen as long term rather than immediate, with Bitcoin’s upgrade path now a key focus.

A Bitcoin whale holding since 2009 moved $8.6 billion in BTC, likely for address upgrade to Native SegWit, per Arkham. Market speculation includes sell-off and hack threats, but no selling signs found.

Presidio Bitcoin launches a GitHub knowledge base tracking Bitcoin's quantum vulnerability, including quantum computing progress, at-risk coins, post-quantum cryptography, and five-step migration paths, aiming to address developer inertia concerns.

Google's Quantum AI paper reduces the qubit requirement to break Bitcoin's elliptic curve encryption to under 500,000, proposing a 9-minute attack window. Once a public key is exposed, an attacker can steal funds before transaction confirmation. Around 6.9 million bitcoins (one-third of supply) already have permanently exposed public keys.