Diginex (EQOS) dropped 15% after a new short report from Iceberg Research.Iceberg claims that company has a "dubious" transaction history and other corporate "red flags." Diginex's key product is its crypto-exchange Equos.Iceberg alleges that Diginex founder Miles Pelham has sold almost all his shares.Recall Jan. 25, Diginex shares higher on signing a strategic partnership with GSR Markets.