Bubbles in everything, or, chronically negative real interest rates will mess you up

The country that gave us bubbles in real estate, equities, jade, paintings, shares in paintings, table salt, fermented tea, fake French wine, 19th-century stamps, silver, and dead-caterpillar fungus is now inflating a bubble in… walnuts? Reuters Insider has the 24fps scoop: 

And, of course, “walnuts go up [in price] every year”. What could possibly go wrong, etc etc etc.