Bitcoin is back in the news, as the digital currency has surged to new all-time highs in recent weeks. A few weeks ago, it was just above $100. Today it's over $260. This surge has prompted Timothy B Lee at The Washington Post to ask whether those who have called it a bubble in the past should retract and admit that they were wrong. Well I'm not totally sure if I've called it a bubble, but I have spoken negatively of it, and I'll say that I still think it's a joke, and probably in a bubble. Now first of all, I find the premise of Lee's post to be hilarious. The currency has been surging several percent every day ... (full story)