An estimated £3-4 billion is being laundered via cryptocurrencies in Europe every year, the director of Europol has told the BBC.<br />It comes as the Shadow Treasury Minister, Alison McGovern, says much speedier regulation is needed.<br />But what are cryptocurrencies? Spencer Kelly explains all.<br /><br />Please subscribe HERE <br /><br />World In Pictures <br />Big Hitters <br />Just Good News
