UPDATE: Coinbase prepares for $100 billion listing - a podcast by BBC World Service

America's biggest crypto-currency trading platform, Coinbase, begins trading on the Nasdaq exchange in New York today Paul Vigna of the Wall Street Journal explains just what the company does to make it quite so highly valued. The BBC’s Rob Young spoke to the President of Coinbase, Emilie Choi, ahead of trading - she told us that the firm was taking a long term view. Plus, Bernie Madoff, the financier convicted of orchestrating the largest Ponzi scheme in history, has died in a US federal prison We hear from the son of one Madoff's victims, who took their own life after losing everything.

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