Shares in publicly traded brain-machine and artificial intelligence firm VisionSys AI (VSA) have plunged more 77% on Wednesday amid word that the firm is selling shares in a registered direct offering.  The firm anticipates it will generate around $12 million in proceeds from the sale, though there is no mention of how its proceeds will be used. VSA—recently priced at$0.29 per share—had already fallen on Tuesday, bringing its five-day dive to more than 88% as of this writing. Wednesday’s low of about $0.24 ...