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spite growing discussion around quantum computing, experts agree that cryptocurrencies are not at real risk from quantum attacks by 2026. The concern is largely theoretical rather than practical at this stage.
Current quantum computers are still far too limited. They lack the number of stable, fault-tolerant qubits required to break cryptographic systems such as ECDSA, which secures Bitcoin and many other blockchains. Breaking these systems would require millions of high-quality qubits, while today’s machines operate with only hundreds of noisy qubits.
Industry analysts, cryptographers, and blockchain developers broadly agree that:
There will be no crypto collapse caused by quantum computing by 2026
Practical quantum attacks on Bitcoin or Ethereum are unlikely before 2030 or later
The crypto community is already aware of the risk and preparing solutions
A commonly mentioned long-term concern is the “harvest now, decrypt later” scenario, where attackers collect encrypted data today to break it in the future. However, this does not pose an immediate threat to active blockchain transactions.
Meanwhile, post-quantum cryptography is already being researched and tested. Blockchain networks can upgrade their cryptographic systems over time, just as they have done with previous protocol improvements.
Bottom Line
By 2026: The quantum threat to cryptocurrency remains theoretical
Long term (2030+): The risk may become more realistic
Current focus: Preparation and gradual upgrades, not panic