Strategy, the world's largest corporate holder of Bitcoin (BTC), has publicly addressed the question of whether the network can withstand future quantum computing attacks. In a recent post on X, the company — which was co-founded by prominent Bitcoin advocate Michael Saylor — said the Bitcoin network is able to implement new security measures as and when they are needed.

"Quantum-resistant upgrades can be adopted if & when it's needed," Strategy wrote.

The remarks come at a time when the crypto industry is debating whether the rise of quantum computing could, in the long run, threaten Bitcoin's cryptographic security. Because Bitcoin relies on elliptic curve cryptography to secure transactions, a sufficiently powerful quantum computer could in theory reverse-engineer private keys from exposed public keys, potentially giving attackers access to the Bitcoin holdings associated with those keys. For a company whose treasury is concentrated in Bitcoin, the network's long-term security is more than an abstract question.

At present, however, there is no known publicly available quantum computer capable of breaking Bitcoin's cryptography in this manner.

Saylor's earlier comments on the quantum threat

While speaking at the World Bank in Washington in October, Saylor said the Bitcoin network would be able to defend itself against any realistic quantum computing threat by coming together and upgrading the software. He estimated that such an upgrade would take roughly 90 days once a worldwide consensus is reached on the need for quantum-resistant cryptography.

Saylor also warned against a hasty introduction of new cryptography, reasoning that more complex security measures may themselves introduce weaknesses. His caution frames the core dilemma facing the network: whether to transition proactively or wait until a credible threat materializes — a balance any quantum-resistant upgrade would ultimately have to strike.

The 90-day estimate has nonetheless come under scrutiny, since a network-wide shift of this kind would involve developers agreeing on technical changes and Bitcoin users moving their funds to new, secure addresses.

Institutional and developer efforts

Strategy has also initiated efforts aimed at research and development for Bitcoin's long-term security. In July, the company was part of a group of seven major financial institutions and crypto companies, including BlackRock and Coinbase, that formed the Bitcoin Security Consortium. The consortium has committed $15 million over three years, with post-quantum cryptography among its key areas of focus.

Bitcoin developers are, in fact, already working on ways to address the quantum computing issue. One of the most prominent proposals is Bitcoin Improvement Proposal 360 (BIP-360), which introduces a new type of transaction output known as Pay-to-Merkle-Root (P2MR). As the scrutiny of Saylor's timeline suggests, any such change depends on developers and users reaching broad agreement — making the progress of BIP-360, and how the consortium deploys its research funding over the next three years, concrete markers to follow as the quantum debate evolves.