Zipmex, the crypto exchange that recently temporarily froze customer withdrawals due to market volatility, has received an investment proposal from an interested party."Our conversations with various interested parties have progressed significantly," the troubled Singapore-based exchange wrote in a Twitter post Monday. "One of those parties has offered terms in an MOU which includes confidentiality obligations so as to be able to commence Due Diligence." MOU is short for a "memorandum of understanding" agreement.Shortly after Zipex halted withdrawals, Thailand's Securities and Exchange Commission swooped in to assess potential losses among the public that may have been fueled by the company, Reuters reported. Zipmex did not immediately respond to a request for comment by Seeking Alpha.Last week, (July 21) Zipmex unveiled loan exposure worth $53M to Celsius and Babel.