Watch collection direction

I was tempted to collect the Oysterdate but has decided to do away with it and to focus my watches to Prince, Bubblebacks, sports and unique dials. During the early days, Oysterdate and rolex President series were common watches  for the Ah beng but once the collectables run out, people began to start a new trend with the do called Stella dials etc.. My guess is once the fever is off, people would wonder why did they start in the first place?