Olivier Stern, a 31-year-old French socialist with an appetite for risk, recently invested a third of his life savings — 10,000 euros, about $11,000 — in a cryptocurrency start-up that has n... Read more
A new virtual gold rush is underway. Even as Bitcoin, riven by internal divisions, has struggled, a rival virtual currency — known as Ethereum — has soared in value, climbing 1,000 percent o... Read more