Zondacrypto Exchange Crisis: Missing Private Key Locks ~$330M BTC, Withdrawals Frozen for 30,000 Users

In April 2026, Poland's largest cryptocurrency exchange, Zondacrypto, entered a public crisis involving at least $97 million in losses and up to 30,000 users unable to withdraw funds. The issue centers on a cold wallet holding approximately 4,500 BTC (~$330 million) whose private key was never transferred after a 2021 ownership change. The founder holding the key, Sylwester Suszek, disappeared in March 2022. The current CEO initially cited the wallet as proof of solvency, then admitted the exchange cannot access it. Authorities have launched a criminal fraud investigation.

On-chain data shows over $21 million transferred out of exchange-linked wallets while hot wallet balances dropped by 99.7%. User withdrawals remain frozen, governance has broken down, and the situation has escalated into a national political scandal. Recovery prospects remain uncertain, with cross-border complications and key individuals unavailable or missing.