Bitcoin is soaring

Bitcoin is soaring as traders return to work after the extended Christmas break. The cryptocurrency is trading up 3% to more than $929 and is at its best level in three years.Bitcoin has seen a volatile 2016 amid uncertainty surrounding the Brexit vote in June and the US presidential election in November. The cryptocurrency rallied from $432 at the start of the year to more than $750 in the days ahead of the UK's vote to leave the European Union, but it fell back below $500 in August as traders