CZ Says Exchanges May Be Safer Than Your Own Wallet

• Binance founder argued today that storing crypto on exchanges may be statistically safer than self-custody.
• He cited data showing 1.57 million BTC lost through self-custody versus 1.51 million lost to exchange hacks.
• CZ stopped short of recommending one approach over the other, calling a mixed strategy “probably best.”

Binance founder Changpeng Zhao waded into one of crypto’s oldest arguments on Monday, with a claim that runs against a decade of “not your keys, not your coins” orthodoxy. In a post on X, CZ argued it may be statistically safer to hold crypto on an exchange than to self-custody it, pointing to data from Bitcoin analyst Willy Woo.

The Numbers Behind the Claim

Woo’s figures, which CZ cited directly, show approximately 1.57 million BTC lost through self-custody errors and against roughly 1.51 million BTC lost to exchange hacks over the same period. In raw terms, people have misplaced or lost access to more bitcoin on their own than hackers have stolen from centralized platforms combined.

CZ acknowledged the comparison has limits. He noted that hack data is easier to collect on the exchange side, since breaches tend to become major news, while lost coins and mishandled seed phrases on the self-custody side often go unreported. He also pointed out that failed exchanges from years past continue to weigh down the exchange-side total, and that Binance and several other platforms have fully reimbursed users after past security incidents.

He did not argue that one approach is categorically better. “Different approaches have different risk profiles,” CZ wrote, adding that a mixed strategy is likely the more sensible path for most holders rather than an all-or-nothing choice.

Why the Timing Isn’t a Coincidence

CZ’s post lands in the middle of an active story: a Coldcard hardware wallet firmware flaw has drained bitcoin from thousands of self-custody addresses since late July, with confirmed losses now well past $100 million across multiple waves. That backdrop gives his argument more weight than it might carry on an ordinary week, and also makes it easier to challenge.

Woo’s own data predates the Coldcard incident, meaning the self-custody loss figure CZ cited doesn’t yet reflect this specific event. Once the Coldcard losses are folded into that tally, the gap between the two numbers narrows, and possibly closes. That doesn’t make CZ’s underlying point wrong, but it does mean the comparison is a snapshot from before crypto’s most damaging recent self-custody failure, not an up-to-date read on where the two loss totals stand today.

Source: CZ’s post on X