Blockchain investigator ZachXBT issued a community alert warning users of withdrawal problems at JuCoin, a platform he first flagged in March 2025 with multiple red flags still unresolved.

Key Takeaways

• JuCoin’s $511 million reserves consist largely of self-issued stablecoins, raising liquidity concerns.

• The platform has rebranded at least three times since launch.

• DPRK-linked funds moved through Ju during its Bybit support claim.

• Ownership remains opaque with no high-quality jurisdiction registration.

According to a warning posted by independent blockchain investigator ZachXBT in his Telegram Channel, multiple users of JuCoin, an East Asian centralized exchange, have reported withdrawal issues over the past week. The alert serves as a community warning ahead of Token 2049, where JuCoin has previously appeared as a sponsor.

ZachXBT noted this is not his first warning about the platform. “In March, I first published a warning for Ju when they were listed as a Platinum sponsor for Token 2049 after I observed numerous red flags,” he wrote.

JuCoin publicly attributed the withdrawal delays to platform upgrades and restructuring but has not provided a timeline for resolution.

The Reserve Question

A separate analysis of JuCoin’s proof of reserves, shared on X, alleged that the platform’s self-reported $511 million in total assets are likely overstated. The core allegation suggests these reserves consist primarily of self-issued stablecoins lacking external backing. Stablecoins counted as reserves are only as credible as the issuer’s backing; if these assets are not verifiably backed by equivalent assets held outside the exchange’s ecosystem, the $511 million figure does not reflect actual solvency.

ZachXBT also raised concerns about ownership transparency. “Ju’s ownership is opaque,” he wrote. “The publicly listed team does not appear to actually control it. That fits a pattern seen with fraudulent offshore exchanges, where the actual principals, often Chinese, stay hidden.” He added that JuCoin fails basic standards for centralized exchanges, including full ownership transparency and registration in reputable jurisdictions.

The Track Record

The withdrawal alert sits against a documented history of incidents connected to the JuCoin ecosystem.

Previously, JuDAO allegedly lost $20 million after deploying a proxy contract that incorrectly left 77 million POL tokens stuck and unrecoverable, followed by a separate $225,000 smart contract exploit.

???JUDAO exploit alert on BSC Chain:

Loss: At least 205,259.490762 USDT, plus 36 BNB routed out via PancakeSwap

Target: PancakeSwap V2 BUSD-JUDAO

Attack Tx:https://t.co/uNxZYb49cB

Summary: The attacker flash-loaned 2,295,723.159642 USDT from Lista DAO: Moolah, bought…

— ExVul (@exvulsec) April 28, 2026

Furthermore, ZachXBT noted that at least $5 million tied to the Bybit DPRK exploit moved through Ju. This occurred during the same period the Ju team publicly claimed it would offer up to 1,000 BTC (approximately $95 million) in financial support for Bybit following that hack.

The exchange’s rebranding history adds further context. The platform has operated under at least three identities—Jubi, JuCoin, and Joy Universe—before settling on its current branding as Ju. Serial rebranding is a pattern ZachXBT has previously identified as a critical red flag in his investigations of offshore exchanges.

JuCoin has not responded publicly to ZachXBT’s reserve allegations or ownership concerns beyond its earlier statement attributing withdrawal delays to upgrades.