Coinbase says its funds are safe after Binance hack
Coinbase says it was not hit by the Binance hot wallet theft and explains how it protects customer funds, according to Unchained.
The facts
- Coinbase said in a Nov. 4 blog post that it was not affected by the Binance hot wallet theft and holds more than 99% of customer assets in cold storage, according to Unchained.
- Binance puts its losses from the Oct. 29 attack at about $6.3 billion, and TRM Labs attributed the theft to North Korea's TraderTraitor group.
- Coinbase named three safeguards: split cold wallet keys that are never put back together, rate limits on moving funds from cold to hot wallets, and kill switches that can halt fund movements.
- Coinbase reported $8.6 billion in cash and cash equivalents and $2.2 billion in crypto held for investment as of Sept. 30, and cited $377 billion in assets on its platform.
Case notes · Danny's take
Why it matters
After a big hack, every exchange has to answer one question: could it happen to you? Coinbase answered fast, and in public. That is the right instinct. But a blog post is a claim, not proof. Hot wallets are the price of letting people withdraw on demand, and every exchange sits on that trade-off. If you keep funds on any platform, you are trusting the controls, not seeing them.
For traders
Don't trade the reassurance. Watch on-chain flows between exchange cold and hot wallets, and net withdrawals from the big venues over the coming days. If users are pulling coins out in size, that tells you more than any blog post.
For builders
Coinbase's three layers are a useful checklist for any custody or wallet product: split keys, withdrawal rate limits and an emergency stop. If your system lets one laptop or one insider move funds, that is the gap an attacker will look for.
Not financial advice. Do your own investigation.
This story was summarised with AI from Unchained's reporting and checked against our editorial policy. Danny's take reflects his views. Disclaimer.
Danny Walter
Founder of Moon Republic, Volt Terminal and Moon Republic Academy. Author of The Market Is a Crime Scene and After the Applause.