Quantum Attack on Bitcoin: A Stealthy Threat

The threat of a quantum attack on Bitcoin is no longer just theoretical. According to Shinobi, a technical editor at Bitcoin Magazine, an actual attack would likely be stealthy and swift. 'You wouldn't get much warning,' he said. 'It's either a fast grab at major exchanges and the ETFs or a quiet drain of Satoshi-era coins moved in chunks.'

Shinobi emphasized that the attacker's motivation determines everything about how the attack plays out. If they want profit, they'll target the most valuable assets. If they want to cause damage, they might go after lesser-known coins.

The number of vulnerable coins is substantial, with Shinobi estimating that a significant portion could be moved quickly if an attacker chose to do so. He also noted that exchanges would be negligent not to migrate their systems immediately in the face of such a threat.

Shinobi discussed the common assumption that dormant coins are lost coins and how this is not necessarily true. He highlighted the importance of migration, particularly for Satoshi-era coins, which could remain frozen due to lack of movement. The Taproot optionality and post-quantum signature work were also mentioned as potential solutions.