CZ Issues New Warning as Exchange Shutdowns Fuel Custody Debate
- MASTR lists decades of CEX closures, renewing focus on self-custody of assets.
- MASTR says CEXs control users’ private keys after crypto deposits are made.
- CZ says CEX acquisitions may inherit hidden security flaws from past systems.
The debate over CEX vs Self-Custodial Wallets has resurfaced after X user MASTR published a database listing dozens of centralized cryptocurrency exchanges that have shut down over the past decade.
The list includes exchanges that ceased operations following bankruptcies, hacks, seizures, disappearances, or planned closures. Among the latest entries are BitMEX, which is scheduled to close on September 23, 2026, BitMart on January 31, 2027, and AscendEX, which ended operations on July 1, 2026.
CEX vs Self Custodial Wallets Return to Focus
According to the database shared by MASTR, exchange closures span from MyBitcoin in 2011 to re…
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