Community consensus may determine Bitcoin’s response to future quantum computing threats.
CryptoQuant CEO Ki Young Ju said up to 6.89 million Bitcoin could face exposure if quantum computing breaks current encryption. He stated that the risk is not near term but large enough to warrant discussion. His remarks focused on older Bitcoin addresses where public keys remain visible on-chain.
Ju said the total includes about 1 million BTC linked to Satoshi Nakamoto. These coins have not moved for years. He noted that long-dormant holdings could draw attention if quantum systems reach a level that can break elliptic curve cryptography.
Ju said around 1.91 million BTC sit in legacy Pay-to-Public-Key addresses. In these addresses, public keys are permanently recorded on the blockchain. If a quantum computer derives the private key, it could authorize transactions without consent.
He added that as much as 4.98 million BTC may have exposed public keys due to past transactions. Once a public key appears on-chain, the exposure remains. He also noted that about 3.4 million BTC have been inactive for at least a decade.
Ju described the Bitcoin quantum threat as a choice between upgrading the protocol or leaving exposed coins at risk. He said users with funds in older formats would face similar conditions.
He referred to past disputes such as the block size debate and SegWit2x. Those events showed that technical proposals require broad agreement. Ju wrote, “Technical fixes move fast. Social consensus does not.”
Ju said developers can design solutions, but community approval determines adoption. He questioned whether users would support freezing inactive coins, including those linked to Satoshi, to protect the network.
Investor Kevin O’Leary has said some institutions may cap crypto exposure until quantum risks are addressed. Analyst VonMises wrote that the threat appears long term and could allow time for infrastructure updates.
