Police in Paraguay have launched an investigation into the death of a Hong Kong-born cryptocurrency fund executive as speculation swirled over the case.Experts on Wednesday also warned of a global rise in violent extortion attempts targeting digital asset holders, a phenomenon known as “wrench attacks”.Paraguayan police are investigating the death of Harry Yeh Chun-tak, who was found dead outside his residential building in Asuncion after a suspected fall from his 30th-floor flat earlier this...