For maybe the best example of how financial trends are diverging at the opposite ends of the wealth spectrum, contrast the cash flowing into the accounts of the already-rich with the debt accumulating in the accounts of the "bottom half":

Mortgage, Groupon and card debt: how the bottom half bolsters U.S. economy

(Reuters) – By almost every measure, the U.S. economy is booming. But a look behind the headlines of roaring job growth and consumer spending reveals how the boom continues in large part by the poorer half of Americans fleecing their savings and piling up debt.

A Reuters analysis of U.S. household data shows that the bottom 60 percent of income-earners have accounted for most of the rise in spending over the past two years even as the their finances worsened – a break with a decades-old trend where the top 40 percent had primarily fueled consumption growth.

With borrowing costs on the rise, inflation picking up and the effects of President Donald Trump's tax cuts set to wear off, a negative shock – a further rise in gasoline prices or a jump in the cost of goods due to tariffs – could push those most vulnerable over the edge, some economists warn.