Elon Musk mocked Binance co-founder Changpeng Zhao with a laughing emoji under an older CZ post warning users about malicious email attachments. In response, CZ asked Musk to stop trolling, calling it a bad time and asking for a little support instead.

CZ added that Binance's $500M investment in Musk's Twitter takeover has since turned into SpaceX shares worth more than $1B.

The exchange is dealing with what it estimates as a $6.3B security incident, the largest hack in crypto history. Binance said the attack likely started from a compromised DevOps engineer's laptop, and stablecoin issuers and other firms have since frozen roughly $3B of the stolen funds.