Quick overview
- Coinbase holds about 5% of all bitcoin in circulation, prompting a call for Bitcoin to enhance its quantum defenses ahead of potential threats.
- Researchers predict that a quantum computer capable of compromising Bitcoin’s security could emerge by 2029, necessitating proactive measures.
- Coinbase advocates for redesigning Bitcoin’s transaction format to allow for gradual integration of quantum-resistant signatures without disrupting existing systems.
- The exchange emphasizes the importance of addressing dormant wallets separately to ensure that any solutions are also quantum-resistant.
About one in every twenty bitcoin in circulation sits in a Coinbase wallet, held on behalf of banks, asset managers, and hedge funds. That concentration of exposure is part of why the exchange published a detailed post this week urging Bitcoin to begin building its quantum defenses well before the threat actually materializes rather than scrambling once it does.
The threat is not here yet. But Google researchers have suggested a cryptographically relevant quantum computer, one capable of reverse-engineering a private key from a public key and draining a wallet, could exist by 2029. Coinbase’s argument is simple: Bitcoin’s decentralized design means changes take years to agree on and implement, so the work has to begin now.
The exchange had several specific things on its list. It wants Bitcoin’s transaction format redesigned so new quantum-resistant signature types can be layered in over time without dismantling what already works. On timing, it wants individual wallets to be able to move to quantum-resistant signatures on their own schedule, without having to wait for the network to settle every outstanding question about older address types first. That way protection does not get held up by debates that may take years to resolve. For large custodians and institutions, the exchange stressed that whatever gets built has to work within multi-party security frameworks, where no single device or individual holds a complete key. Most serious institutional setups already operate this way, and a quantum fix that does not account for that would leave the biggest holders exposed.
The dormant wallet question is where Coinbase pulled back from taking a firm position. Coins sitting in old address types have already exposed their public keys on-chain, making them targets the moment a capable quantum machine exists. Rather than weigh in on what the network should do about those coins, the exchange said that argument should run on a separate track from the technical upgrade work, so one does not hold the other hostage. Any eventual approach to those wallets, it added, must itself be quantum-resistant, or fixing one problem just opens another.
The underlying message is that the cost of starting late is higher than the cost of starting now.
Sophia Cruz
Financial Writer – Asian & European Desks
Sophia is an experienced writer, reporter and newsdesk member, mostly on the financial sectors. For the past 5 years Sophia has covered a wide variety of topics such as the financial markets, economics, technology, fin-tech and trading. Sophia has been a part of the FX Leaders team since 2017 and works on producing valuable content and information for traders of all levels of experience.
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