Yen and Bitcoin: Inflating currencies
We explore cash today, both real and virtual. Japan's central bank governor has been trying to reflate his country's currency, by pumping a huge amount of money into government bonds. But is this helpful amid talk of currency wars? We hear from the World Bank's boss Jim Yong Kim, on this and on his aim to see an end to extreme global poverty by 2030. Also we look at the Bitcoin boom - is it a new dawn for currency or another speculative bubble? We get the thoughts of Matthew Bishop, the US Business Editor of the Economist Magazine, who's co-written a book, In Gold We Trust? The Future of Money in an Age of Uncertainty.