Cryptocurrency markets suffered a sharp sell-off on Friday after hackers stole $6.3 billion (£4.7 billion) in digital assets from Binance, the world’s largest cryptocurrency exchange, in what could be the biggest cryptocurrency theft on record.
The security breach, which reportedly involved the compromise of a laptop belonging to a Binance development and operations engineer, allowed attackers to access the exchange’s infrastructure and transfer billions of dollars in digital assets.
The stolen assets were reportedly taken from Binance-controlled hot wallets, which remain connected to online systems to facilitate transactions and customer withdrawals.
The incident has raised serious questions about cryptocurrency exchange security, particularly the risks associated with privileged access to systems responsible for moving substantial quantities of digital assets.
Binance has pledged to cover customer losses using its own funds, while working with law enforcement agencies, blockchain intelligence companies, stablecoin issuers and other industry partners to trace and recover the stolen assets.
The exchange has also taken steps to restrict withdrawals and contain the breach while investigators assess the full extent of the compromise.
The FBI confirmed that it was aware of the incident and was coordinating with public and private-sector partners to establish the scale of the attack and determine the appropriate investigative response.
Blockchain intelligence researchers have suggested that a North Korean state-linked hacking group may be responsible, although the attribution remains subject to further investigation.
The reported $6.3 billion theft would substantially exceed the $1.5 billion stolen from cryptocurrency exchange Bybit in February 2025, making it an unprecedented incident for the digital asset industry.
Bitcoin fell sharply towards $77,000, retreating from levels above $86,000 earlier in October as investors reacted to the breach and growing uncertainty across cryptocurrency markets.
Over the preceding 24 hours, Bitcoin declined 5.3% to $77,503.39, while Ethereum dropped 6% to $2,216.25.
Other major cryptocurrencies recorded even steeper losses, with BNB falling 6.5% to $699.13 and Solana sliding 7.7% to $94.57.
The declines reflected a broad reduction in risk appetite as traders assessed the implications of the attack for market confidence and exchange security.
Shares in cryptocurrency-related companies also came under heavy pressure on Wall Street.
Coinbase Global plunged 12.7%, despite reporting quarterly results that exceeded analyst expectations, as investors focused on the wider consequences of the Binance breach.
Strategy, the Bitcoin-focused investment company formerly known as MicroStrategy, fell 6%, reflecting the impact of declining cryptocurrency prices on companies with substantial digital asset exposure.
Strategy has stated that it holds approximately 4% of Bitcoin’s total supply, making its financial position particularly sensitive to movements in the cryptocurrency’s value.
The sell-off comes amid broader weakness in US technology stocks, where concerns about artificial intelligence spending and corporate earnings have already unsettled investors.
The Binance attack has renewed debate over the risks of centralised cryptocurrency exchanges, particularly their dependence on operational security, privileged employee access and systems capable of authorising high-value transfers.
Unlike conventional bank deposits, cryptocurrency holdings generally lack equivalent statutory deposit protection, leaving customers dependent on the financial strength and security arrangements of individual platforms.
Although Binance has committed to covering losses, the recovery of stolen funds remains uncertain, particularly where attackers have transferred assets across multiple blockchain networks.
Industry investigators are working with token issuers and other infrastructure providers to freeze affected assets and limit the attackers’ ability to convert or withdraw the stolen cryptocurrency.
For investors, the breach represents a major challenge to confidence in digital asset markets, demonstrating that even the largest trading platforms remain vulnerable to sophisticated cyberattacks.
The incident also highlights the potential for exchange security failures to affect cryptocurrency prices, listed companies and wider investor sentiment.
Attention will now turn to the progress of the FBI investigation, the recovery of stolen assets and Binance’s ability to fulfil its commitment to cover customer losses, as cryptocurrency markets attempt to stabilise following one of the industry’s most significant security incidents.
