Is fashion worth the money spent?

The fashion industry eulogises the benefits of adding to our already ample wardrobes with “investment pieces”, but does the concept of “investing” in fashion really stand scrutiny?
If the definition of an investment is money you put into something which is expected to increase in value, can you really apply this logic to clothing? If every piece of fashion starts to depreciate as soon as it goes on your back, can you compare a portfolio of stocks and shares to a pair of Prada shoes or an Hermès handbag?