The threat has already influenced institutional behavior, with firms like Jefferies removing Bitcoin from portfolios due to long-term security concerns.

Some estimates warn that up to about a third of circulating token value could be at risk from quantum attacks in the coming years, shaping market projections and investment strategies.

The cryptocurrency industry is gearing up for quantum threats that could break current cryptography and wallets, prompting plans for post-quantum upgrades and interoperable standards across blockchains.

Notable efforts include the Ethereum Foundation targeting protection by around 2029, Algorand Foundation publishing a post-quantum roadmap and plans for post-quantum accounts, and industry voices comparing the scale of the engineering overhaul to a Y2K-style reset.

Experts caution that the shift to post-quantum cryptography will take years and will involve challenges such as larger digital signatures and greater storage and bandwidth needs.

The report draws on Reuters, CoinGecko, and academic research, alongside contemporary industry commentary and expert assessments.

Concern has intensified as Google findings and analyses from Citigroup and others suggest accelerated timelines for crypto vulnerability.

Google researchers call for awareness and security guidance before quantum threats become practical, noting that traditional finance can upgrade more quietly than public blockchains.

Policy context includes a May executive order to boost U.S. quantum capabilities and a Commerce Department plan to invest over $2 billion in quantum computing initiatives.

Analyses from Citi and others indicate AI and quantum advances compress the window for vulnerability, underscoring urgency for security upgrades.

Experts say the threat is not imminent but could emerge within the next decade, prompting proactive planning and risk mitigation.

Investors watch which networks are best prepared for a quantum-enabled future, as successful upgrades could shift market leadership and confidence.