There are growing concerns from economists, tech industry insiders and investors that artificial intelligence might be a bubble about to burst. Data centres are a rapidly growing part of the U.S. so big that some observers like MIT fellow Paul Kedrosky believe it's warping the North American economy. Murad Hemmadi, a reporter with the Logic, argues that we only know about bubbles in hindsight, and until it bursts, we're going to be waiting to find out.