When household wealth tracks the growth of the economy, it’s a sign that the wealth increase is likely organic, healthy, and sustainable. When household wealth far outpaces the growth of the underlying economy, however, that is a tell-tale sign that the boom is artificial and unsustainable. The last two times household wealth growth exceeded GDP growth by a large degree was during the late-1990s dot-com bubble and the mid-2000s housing bubble, both of which ended in tears. The gap between household wealth and the economy is far larger today than it was in the last two bubbles, which means that the coming reversion or crash is going to be even more painful, unfortunately.