South Korean authorities are investigating a possible crypto investment scam involving the Seoul-based Shinil Group as the key figure, Korea JoongAng Daily reported July 31. Shinil Group (Shinil) allegedly promised to pay investors in gold from a sunken Russian shipwreck. Earlier this month, Shinil announced it had found the Dmitrii Donskoi, a Russian armored cruiser that sank 113 years ago, according to Reuters. The company claimed that the ship was loaded with 150 trillion won ($131 billion) worth of gold. To encourage investors to purchase the company’s own cryptocurrency, Shinil…