Checking stock prices too often is not good for your financial health, according to research. Photograph: Andrew Burton/Getty Images

Would you invest your money with a manager who didn’t know the names of any of the stocks in his portfolio, or the price they were purchased at? How w(...)

Cameron and Tyler Winklevoss, who have amassed a large bitcoin portfolio, in their office in New York last week. The twin brothers’ decision to go public with their position on the digital currency signals a new stage for what has been an experimental alternative to national currencies. Photograph: Agaton Strom/The New York Times

Bitcoin’s wild ride may not have been the biggest business story of the past few weeks, but it was surely the most entertaining. Over the cours(...)