A little over 100 years ago, there was a bubble asset that rose and fell wildly over the course of a decade. People who held it would have lost 100 per cent of their money five different times. They would have, at various points, made huge fortunes, or seen the value of their asset destroyed by hyperinflation.

The asset I’m referring to is gold priced in Weimar marks. If this reminds you of bitcoin, you are not alone. In his newsletter Tree Rings, analyst Luke Gromen looked at the startling similarities in the volatility of gold in Weimar Germany and bitcoin today. His conclusion? Bitcoin isn’t so much a bubble as “the last functioning fire alarm” warning us of some very big geopolitical changes ahead.

I agree. Central bankers have over the past 10 years (or the last few decades, depending on where you put the marker) quashed price discovery in markets with low interest rates and quantitative easing. Whether you see this as a welcome smoothing of the business cycle or a dysfunctional enabling of debt-ridden businesses, the upshot is that it’s now very difficult to get a sense of the health of individual companies or certainly the real economy as a whole from asset prices.