Gemini CEO Cameron Winklevoss threatened to sue Digital Currency Group CEO Barry Silbert over the repayment of a $900 million loan in a tweet published just minutes after Genesis filed for Chapter 11 late Thursday night. The tweet comes after Winklevoss waged a Twitter war against DCG to recover the loan amid his exchange’s own struggles.

Winklevoss called the lender’s bankruptcy a “crucial step” toward recovering Gemini users’ assets. But, he still intends to sue Silbert and Genesis’ parent company, DCG, unless Silbert makes a “fair offer” to its creditors.

“We have been preparing to take direct legal action against Barry, DCG, and others who share responsibility for the fraud that has caused harm to the 340,000+ Earn users and others duped by Genesis and its accomplices,” wrote Winklevoss.