On March 12, 2026, a research report jointly released by Ark Invest and Unchained analysts explored the profound implications that advancements in quantum computing technology could have on Bitcoin. While current technology does not pose a genuine threat, the report warns that if quantum computing achieves a breakthrough, approximately 35% of Bitcoin's supply could be at risk due to the vulnerability of its core cryptographic safeguards.
Which Bitcoin Holdings Face Quantum Threats?
According to the research, approximately 6.9 million Bitcoins, representing 34.6% of the total supply in circulation, are held in addresses that could potentially be compromised by future, highly advanced quantum computers. The most significant risk stems from addresses whose public keys have already been exposed through prior transactions. This segment accounts for nearly 5 million Bitcoins, or a quarter of the total supply.
Quantum Computing Capabilities: Not Yet There
Analysts emphasize that breaking Bitcoin's underlying Elliptic Curve Cryptography would require approximately 2,330 logical qubits and billions of quantum operations. This computational feat is far beyond the capabilities of current quantum computers, which typically operate below 100 logical qubits. David Puell, a research contributor at Ark Invest, notes that this technological leap will not occur overnight but rather through incremental progress. In his view, this gradual advancement provides ample time for software developers to implement crucial security measures.
Furthermore, the report highlights that the cryptographic algorithms used by Bitcoin are vital to the security of the global internet, banking, and communication infrastructure. Consequently, if a quantum computing leap were to occur, Bitcoin might not be the first system affected; the entire industry could simultaneously pivot towards adopting post-quantum cryptographic solutions.
Mitigation Strategies Within the Bitcoin Ecosystem
The report indicates that countermeasures against potential quantum threats are already being discussed within the Bitcoin ecosystem. These include enabling quantum-resistant address formats through potential future soft forks and encouraging users to transfer their holdings to wallets secured by new cryptographic algorithms. One notable suggestion is BIP-360, Pay-to-Merkleized-Root (P2MR), which aims to prevent the leakage of public keys during transactions, thereby assisting users in moving assets to more secure addresses.
Looking ahead, should quantum threats become a reality, the Bitcoin network might consider implementing community-driven governance measures, such as limiting or even freezing Bitcoins still held in insecure formats. However, the report's authors caution that such far-reaching initiatives would require broad consensus within the decentralized ecosystem.
In conclusion, the report posits that while quantum computers do not pose an immediate threat to Bitcoin's security, the ecosystem still has valuable time to implement precautionary measures.