FTX investors have voluntarily dismissed their proposed class action lawsuit against the prominent US law firm Sullivan & Cromwell. The investors had accused the firm of participating in FTX's multibillion-dollar fraud and subsequently enriching itself as its bankruptcy counsel. The decision to drop the lawsuit, which was filed in a Miami federal court, came after the lead counsel, Adam Moskowitz, reviewed the evidence and found insufficient grounds to proceed. The dismissal was made with prejudice, meaning the case cannot be refiled, and no settlement was involved.