This is a Facebook meme floating around libertarian circles. Here is also an article from The Examiner website which points out how off the mark Krugman was. The meme seems to be passed around as a response to Krugman’s skepticism toward Bitcoin.
It doesn’t take much effort to google the quote and find out where it came from. Krugman explains here,
First, look at the whole piece. It was a thing for the Times magazine's 100th anniversary, written as if by someone looking back from 2098, so the point was to be fun and provocative, not to engage in careful forecasting; I mean, there are lines in there about St. Petersburg having more skyscrapers than New York, which was not a prediction, just a thought-provoker.
It reminds me of how groups discard or accept evidence based on how well it fits with their meta-narrative of how the world works. Paul Krugman is a negative icon in the libertarian narrative, so when they hear that he said something totally wrong they accept it without looking at where it came from. If a quote like this was attached to Milton Friedman’s picture and hovering around, I suspect libertarians would look beneath the top layer.
