AscendEX hot wallets were breached
AscendEX identified unauthorized transfers from hot-wallet infrastructure across several networks on December 11, 2021 and temporarily suspended deposits and withdrawals while rebuilding affected infrastructure.
Status effect: limitedConfidence: highDirect event-linked evidence: 2
Login and withdrawal access failed during police investigation
Users lost login and withdrawal access, while AOFEX said technical and wallet personnel were assisting a police investigation and no staff were available to restore the servers.
Status effect: deadConfidence: highDirect event-linked evidence: 2
BitMart reported a large-scale hot-wallet security breach
BitMart identified a large-scale security breach involving an Ethereum hot wallet and a BNB Smart Chain hot wallet and temporarily restricted withdrawals during its response.
Status effect: limitedConfidence: highDirect event-linked evidence: 1
Coinsuper was treated as dead
Public exchange-status sources treated Coinsuper as dead in late 2021 under business-reasons handling.
Status effect: deadConfidence: mediumDirect event-linked evidence: 1
Coinsuper was marked dead after 2021 financial troubles
Public exchange-status coverage stated that financial troubles persisted through 2021 and later resulted in the firm closing business, after which the platform was marked dead.
Status effect: limitedConfidence: mediumDirect event-linked evidence: 0
Binance JEX ceased operations
The JEX platform officially ceased operations on 2021-12-01, while users could still log in and withdraw assets. Cryptowisser marked Binance JEX dead and moved it to its Exchange Graveyard.
Status effect: deadConfidence: highDirect event-linked evidence: 3
Binance JEX officially ceased operations
After closing new mainland-China registrations, deposits, spot trading, and futures trading in stages, Binance JEX officially ceased operations on December 1, 2021.
Status effect: deadConfidence: highDirect event-linked evidence: 2
BiKi was moved to dead-side handling
Public exchange-status sources marked BiKi dead on 2021-11-30 after the regulatory-reasons closure announcement.
Status effect: deadConfidence: highDirect event-linked evidence: 2
AOFEX removed its mainland-China applications
AOFEX said it completed removal from mainland-China application marketplaces while cooperating with local regulatory requirements.
Status effect: limitedConfidence: highDirect event-linked evidence: 1
BiKi announced closure due to regulatory reasons
Public exchange-status coverage stated that BiKi decided to close down its operations due to regulatory reasons and announced this on its website.
Status effect: limitedConfidence: highDirect event-linked evidence: 0
Coineal officially ceased operations and was treated as dead
Public exchange-status sources treated Coineal as dead based on the posted statement that the platform would officially cease operations on 2021-11-15.
Status effect: deadConfidence: highDirect event-linked evidence: 2
Coinone's virtual-asset service provider filing was accepted
Coinone announced that South Korean authorities had accepted its virtual-asset service provider filing under the revised financial-transaction framework.
Status effect: activeConfidence: highDirect event-linked evidence: 1
Cryptox marked dead
Public exchange-status sources marked Cryptox as dead on 2021-11-11.
Status effect: deadConfidence: mediumDirect event-linked evidence: 2
Cryptox site became inaccessible
By 2021-11-11, public exchange-status sources reported that the Cryptox website was not accessible and there had been no prior maintenance notice.
Status effect: limitedConfidence: mediumDirect event-linked evidence: 0
BTC-Alpha reported a hacker attack
Russian-language crypto reporting described a hacker attack against BTC-Alpha and reported that user funds were safe.
Status effect: noneConfidence: mediumDirect event-linked evidence: 2
Coineal announced final shutdown timeline
Public exchange-status coverage stated on 2021-11-01 that Coineal had already stopped registration and identity verification for new mainland China users in 2019 and would officially cease operations on 2021-11-15.
Status effect: limitedConfidence: highDirect event-linked evidence: 0
JEX announced platform suspension schedule
JEX announced that, as per latest regulatory requirements, new mainland China registrations and KYC were stopped and the platform would officially cease operations on 2021-12-01.
Status effect: deadConfidence: highDirect event-linked evidence: 2
BHEX completed its staged platform shutdown
BHEX permanently ended platform access after progressively stopping registration, deposits, derivatives, spot trading, and withdrawals during its October 2021 wind-down.
Status effect: deadConfidence: mediumDirect event-linked evidence: 3
Bidesk permanently shut down
Bidesk completed a staged permanent shutdown after stopping trading and providing a final withdrawal period in October 2021.
Status effect: deadConfidence: mediumDirect event-linked evidence: 2