Quantum Computing Threats Drive Crypto and Firms Toward Post‑Quantum Security

Advances in quantum computing are predicted to enable the rapid breaking of current encryption methods, with Google research suggesting capable quantum machines could appear by 2029. This accelerates concerns about the "harvest now, decrypt later" strategy, where adversaries record encrypted data today to decrypt it once quantum computers become powerful enough.

The $2 trillion global cryptocurrency market is especially vulnerable. Studies cite that roughly 35 % of Bitcoin’s circulating supply could be exposed to a quantum attack, with some estimates rising to 50 %. Crypto firms and blockchain developers are drafting plans to adopt quantum‑resistant cryptography, a transition that could take years. Reuters reported that industry leaders such as BTQ Technologies describe the risk as "the most direct and existential threat" to digital assets.

Major technology companies are also moving. Microsoft announced it will speed up its internal timeline to migrate critical services to post‑quantum cryptography by 2029, following the U.S. executive order on quantum‑safe security. BlackRock added a quantum‑computing risk factor to its iShares Bitcoin and Ethereum ETF filings, highlighting the material nature of the threat for institutional investors. Small‑business guidance stresses the need for crypto‑agility and prioritizing long‑lived sensitive data.

Collectively, these developments show a growing industry‑wide shift toward integrating post‑quantum encryption to safeguard data and financial assets before quantum computers become operational.