"Despite billions spent on blockchain improvements and security measures, crypto criminals still steal billions of dollars from the crypto ecosystem each year, and that didn`t change in 2025. In fact, with over $4 billion in total losses from hacks, fraud, scams, money laundering, and ransomware, 2025 was the worst year for crypto illicit activity ever recorded. However, cryptocurrencies, and Bitcoin in particular, could face a completely new kind of threat in the future - quantum computers."
"According to data presented by TechGaged, roughly 4.9 million BTC worth over $455 billion is currently exposed to a potential quantum attack due to address reuse alone, 16% more than just five years ago. Reused Addresses Add Roughly 100,000 BTC to Quantum Exposure Each Year Ever since Google announced "quantum supremacy" in late 2019, quantum computers have become a hot topic in the tech space."
Crypto criminals stole over $4 billion through hacks, fraud, scams, money laundering, and ransomware in 2025, making it the worst year on record for illicit crypto activity. Approximately 4.9 million BTC, worth over $455 billion, is exposed to potential quantum attack due to address reuse, a 16% increase from five years earlier. Address reuse is adding roughly 100,000 BTC to quantum exposure each year. Shor's algorithm could allow quantum machines to derive private keys from public keys, undermining Bitcoin's security model. Powerful quantum machines capable of such attacks are not publicly available yet, but major institutions have raised concerns.
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