Hyman Minsky distinguishes three rough kind of finance: hedge, speculative and Ponzi. He argues that the movement of the economy towards speculative and then Ponzi finance is one of the motors of economic crisis. The implication is that a certain amount of regulation is useful here.

... and I don't think you can draw any lines between Minsky and anti-Jewish conspiracy theories. Indeed, "all criticism of speculation is anti-semitic" is as much a "conspiracy theory" as any other hot-button generalization.