As per this announcement, ZBT is delisted from Bitfinex, ceasing trading on 18/06/21 at 12:00 PM UTC.
ZB (ZBT) manages a network that includes digital assets exchanges, wallet services, capital venture arms, research institutes and media. It is a cryptocurrency token operating on the Ethereum blockchain.
Important: ZBT deposits, trading, and withdrawals are restricted to KYC-verified customers with a minimum intermediate level of verification and specific jurisdictions.
To verify, traders can redirect to bitfinex.com/verification