Watches, like any asset class, will carry elements of speculation and investment especially when supply is tight and demand high. Even for the hardcore enthusiast, who can resist making a fast buck here and there? And really what's wrong with that?
The article asserts watches "could be investments". That's not incorrect. But the more correct reality is some watches do well as short term speculation, and others fare best as longer term investments. Grey dealers, and some of us lol, make big bucks as speculators; Christie's, Sotheby's and Antiquorum make salivating killings for watch investors.
From experience, some sports model Rolex (the usual suspects lol) and some of the base PAMs including some of the limited editions are indeed well proven performers for speculation.
For longer term investments, generally PPs and vintage Rolexes are the best performers by far.
So yes, subject to the above assertions, watches "could be" good speculation and investment. And it ain't a crime! Just do it!