{video} Bitcoin has been around for more than a decade, yet the question still persists: “What’s the purpose of cryptocurrency?” Even though people have bought and sold billions of dollars of the stuff, it has yet to find a role in everyday life. Now, this search for the cryptocurrency world’s “killer app”—the equivalent of a transformative application like Gmail or Uber—may be over. According to Patrick Byrne, the CEO of Overstock and a longtime booster of digital money, the breakthrough is coming in the form of security tokens. These are units of cryptocurrency that are tied to some real world asset such as real ... (full story)