As digital currency’s popularity rises, so do privacy fears

Is this the beginning of the end for cash?

 Backers see it as a way to reach the unbanked. But any system could give the government a record of every dollar you spend. Some countries are already testing it, and influential figures in the US are warming to the idea. Gregory Barber explores whether digital currency is a great answer for the dwindling use of cash or just another way for governments to reduce privacy.