I have been collecting watches since 2010. In the last 4 years I have amassed a sizable collection. From sports watches to formal, from diver watches to pilot, new to vintage and many others in between. The hobby has been both rewarding in terms of knowledge and fun.
It is an expensive hobby. You need to be earning decent living before you can indulge in this hobby. Even then, if you get carried away, you can be spending a fortune!
The watches bought has value. However, it is very seldom you get an appreciation in value. Nevertheless, the used watch market is very lively and if you need to generate some cash, it is possible to do so. Expect a loss of 50%.