Bitcoin's incredible rise continues, with the digital currency climbing above $15,000. Bitcoin has now risen by over $3,000 over the last 36 hours and has gained well over 1,000% across 2017. The incredible rise means the total value of the entire cryptocurrency market has now passed $400 billion. The digital currency began the year below $1,000 and its gains have accelerated as investor interest grows. Chicago-based Cboe Global Markets is planning to launch bitcoin futures on Sunday, while the world's largest futures exchange, CME, is set to launch its futures product the following week. The addition of bitcoin futures by two respected exchanges marks another step towards establishing the digital currency as a legitimate asset class.