I think something like three-quarters of American currency is held abroad, by drug dealers, by tax evaders, Russians and Chinese. Other people think that they want to protect themselves against their own currency going down. When you have 75% of the currency and even more of the high-denomination $100 bills held abroad, you wonder whether these are people we really want to pay. If you get rid of the $100 bills, its foreign holders will be the main losers.

That's the problem with the financial sector. Banks and the financial sector live in the short run, not the long run. In principle the government is supposed to make regulations that help the economy over time. But once it's taken over by the financial sector, the government lives in the short run too.

There really isn't a recovery, and no signs of it on the horizon, because people have to pay the banks. It's a vicious circle - or rather, a downward spiral.

Now, suppose that a homeowner puts down only 3% of their own money or 3.5% for the FHA. That means if prices go down by only 3%, the house will be in negative equity and it would pay the homeowner just to walk away and say, "The house now is worth less than the mortgage I owe. I think I'm just going to move out and buy a cheaper house." So it's very risky when you have only a 3% or 3.5% equity for the loan. The bank really isn't left with much cushion as collateral.

Look at Ukraine. Its currency, the hernia, is plunging. The euro is really in a problem. Greece is problematic as to whether it can pay the IMF, which is threatening not to be part of the troika with the European Central Bank and the European Union making more loans to enable Greece to pay the bondholders and the banks. Britain is having a referendum as to whether to withdraw from the European Union, and it looks more and more like it may do so. So the world's politics are in turmoil.

Almost all of the demand for oil that suddenly pushed prices up was speculative demand. People began to speculate not only in stocks and bonds and real estate, but also in commodities. The market went up for old tankers, which were used simply to store oil in. A lot of the oil was simply being stored for trading, not used.

Oil is a special case. Saudi Arabia is trying to drive U.S. fracking rivals out of business, while also hurting Russia. This lowers gas prices for U.S. and Eurozone consumers, but not by enough to spur economic recovery.