Airing on Thursday, July 2, 2015: First up, we’ll talk with Nathaniel Popper, author of “Digital Gold: Bitcoin and the Inside Story of the Misfits and Millionaires Trying to Reinvent Money,” about whether or not the banking crisis in Greece is good for Bitcoin. And Matt Novak, who writes Gizmodo’s Paleofuture blog, joins us to talk about Back to the Future: Part 2 and the origins of our obsession with hoverboards.