While investment in stocks, shares and bonds remains an uncertain option, alternative investments, such as art, cars, coins and stamps, have become increasingly attractive. The rate of return can be spectacular, and this is true nowhere more than in the world of wine bottles. Between 2012 and 2017, for instance, the Petit Mouton 2011 vintage appreciated from £690 per case to £1,831, an increase of 165 percent. Last year, two of just 600 surviving bottles...