According to Cointelegraph, Quantus founder says crypto's first quantum attack will likely appear as an unexplained breach rather than a dramatic public hack. Bad actors with access to a cryptography-breaking quantum computer would probably target less conspicuous wallets than Satoshi Nakamoto's well-known Bitcoin holdings, crypto executives suggest.
The useful takeaway here is threat modeling: a real quantum break would likely show up as quiet, unattributed drains of dormant or reused-address funds rather than a headline attack on famous wallets, so early detection matters more than dramatic proof. If you hold keys or custody user funds, it's worth checking whether you reuse addresses and tracking the migration timelines for post-quantum signatures on the chains you build on. For most teams this is still a monitor-and-prepare item, not an emergency, but the assumption that you'd get obvious warning is the part worth discarding.
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