Interest among financial institutions in bitcoin derivatives contracts highlights worrying reminders of the not-too-distant past.
National cryptocurrencies could make payments faster and prevent crime, but they come with their own risks.
The Pirate Bay is among those accused of using customers' computers to mine cryptocurrency.
An analysis of Bitcoin's fundamentals shows how much of a bubble its price has inflated to.
Within the world of cryptocurrencies, ICOs are the way to raise funds – but without any government oversight.
As cryptocurrency systems improve, they will better protect criminals' identities and even allow people to offer anonymous rewards for crimes they want committed.
Despite its name, cryptocurrency isn't just money. It could also be debt or equity and so it should be regulated and taxed in the same way as other finance.
Regulation and oversight could be the saviour or the death of a Bitcoin and others.
Cybercriminals increasingly depend on e-currencies to profit from their misdeeds. They, and their potential victims, could be driving some of the growth in cryptocurrency markets.
The future and the past, money, technology and politics documented and imagined in fact and fiction, in an economist's recommended reading.