BlackRock’s 815,000-Bitcoin ETF Raises a New Custody Question After the Binance Hack

BlackRock’s 815,000-Bitcoin ETF Raises a New Custody Question After the Binance Hack


Green hardware wallet displaying a transaction confirmation image By Isaac • November 1, 2026 11:50 pm •

A cold wallet is not automatically a safe wallet. That is the uncomfortable point hanging over the world’s largest spot Bitcoin ETF after the record Binance breach.

CryptoSlate reports that OneKey founder Yishi Wang has warned that BlackRock’s iShares Bitcoin Trust could become an attractive target for North Korean hackers because its scale concentrates an unusually large pool of Bitcoin behind one institutional custody operation. The warning is not evidence that IBIT or its custodian has been compromised, and Wang did not present proof of an active attack against either company.

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It is a reminder that a concentrated pool of Bitcoin can be exposed through the systems and people used to approve transactions—even when the private

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