What's so good about cryptocurrencies like Bitcoin?

To some people cryptocurrencies such as Bitcoin are merely a risky fad, a gamble that might pay off only in the short run. To others, including IT security specialist Pavol Luptak, they are a 'tool of liberation' from government control and the hope of a better future. Why is it that many people are so keen on this new decentralised form of money? And why do they think society as a whole would be better off if everybody used it? Jonathan McCormick recently caught up with Pavol to ask him these questions and more.

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