Circle was established in 2013. Since its establishment, the company has been favored by capital, and has received a total of US$250 million in capital injection so far. Investors include Goldman Sachs, IDG Capital and hedge fund Pantera Capital. Currently, Circle provides four major products: Circle Invest, which makes it easier for people who have never had digital currency investment experience to invest in digital currency; Circle Pay, which allows you to send text messages as casually as you want transfers; Circle’s digital currency over-the-counter trading team (Circle Trade) currently has a monthly transaction volume of 2 billion US dollars; in addition, Circle’s digital currency Exchanges Poloniex is one of the largest digital currency exchanges in the world.