The Guardian view on cryptocurrencies: a greater fool’s gold | Editorial

The apparently endless rise in the prices of cryptocurrencies is a monument to greed and gullibilityLast month a plague of kittens brought down one of the most fashionable cryptocurrencies on the internet. This might not have been news, except that the cryptocurrency, Ethereum, bills itself as “the world computer” – a distributed program that can replace large parts of both the legitimate banking system and the legal system itself, since contracts can be written into computer c