- Almost one-third of all mined Bitcoin now has publicly visible keys on-chain, which means that exposure can be measured if quantum computers are able to break current cryptography.
- Approximately 6.04 million BTC are in the “exposed” category, and almost 13.99 million BTC are “protected” as their public keys are still hidden.
- Bitcoin’s exposure to quantum is dynamic, and varies significantly based on how large custodians address quantum wallet hygiene before quantum technology becomes mature.
According to a new report from on-chain analytics firm Glassnode, nearly a third of all Bitcoin ever minted is held in wallet structures where the underlying public key is now on display on the blockchain—exactly the condition that would make them vulnerable if a powerful quantum computer ever emerged.
The figure breaks down into two distinct problems with very different remedies.
The 30% Number and What It Actually Means
The first and foremost issue is technica...
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