The Economic Offence Wing (EOW) of Odisha police has unearthed a pan-India cryptocurrency-based Ponzi scam involving money of more than Rs 1000 crore, a police official said on Monday. The EOW has arrested the head of STA Crypto Token namely Gurtej Sigh Sidhu (40), from Sri-Ganganagar, Rajasthan and its Odisha unit head Nirod Das.