One of the world’s leading cryptocurrency startups, Circle, is seeking to raise $250 million according to sources directly involved with the initiative. Circle is the operator of the Poloniex cryptocurrency exchange, currently ranked 74 in the world by volume on Coinmarketcap. The firm acquired Poloniex for $400 million and also runs an institutional trading branch called Circle Trade.$246 Million Previously RaisedCircle was valued at a formidable $3 billion at the time of its last funding round when it raised $110 million, largely from Bitmain, the world’s leading manufacturer of bitcoin and cryptocurrency mining hardware. Circle has raised $246 million to date over six different rounds, with other investors including Goldman Sachs, IDG Capital, and Baidu of China.The $3 billion valuation

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