Central bankers have always been protective of the currencies they keep. Stability is a top priority, which has made them rather cautious about solutions that threaten that position. Yet, lately, they’ve thrown that caution to the wind as more regulators actively start experimenting with the idea of cryptocurrencies and the underlying blockchain technology. Even the SA Reserve Bank is warming up to the idea of digital currency. And it has asked the industry to help it come up with the best ideas.