Quantum Proposal Won’t Save Satoshi’s Bitcoin, Says Cardano Founder

• Quantum computing could threaten Bitcoin security between 2029 and 2035.
• Legacy Bitcoin wallets may expose 34% supply, about 8 million BTC at risk zone.
• Bitcoin upgrades may require a hard fork, raising governance and coordination risk.

Charles Hoskinson recently argued that quantum computing poses a serious long-term threat to Bitcoin’s cryptographic security model and overall resilience. He said the risk could materialize between 2029 and 2035, although timing remains uncertain. 

Legacy Wallets Face Growing Exposure

Hoskinson pointed to structural weaknesses in older Bitcoin address formats. He claimed that approximately 34% of the total supply remains vulnerable due to exposed public keys. This figure represents nearly 8 million Bitcoin. 

Moreover, he emphasized that early-era coins, including around 1.7 million Bitcoin, cannot migrate easily to newer se…

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