Bitcoin’s astronomical rally has cryptocurrency bulls feeling vindicated. Not so fast, skeptics say. The digital currency’s more than 100 percent surge in the past two months looks eerily familiar, argue the bears, pointing to November 2013, when the price quintupled in short order to top $1,000 for the first time. By Valentine’s Day it was worth around half that, and spent the better part of the next two years languishing below $500. Then it absolutely exploded -- jumping more than $1,400 in two months. At its height last week, one bitcoin could buy about two ounces of gold. Its champions touted the arrival of ... (full story)