You know, like real instruments that become more valuable with age.
 
Do bits age?

Nothing's impossible with hipsters... And don't throw that old AWE64 away just yet.

I can always claim I have serial # 00000001 but it got rubbed off.

Like Albertson's or Safeway?  

Perhaps good plugs will become more sought after a certain point. But after that, technology will reach a point when plugins will not be used. You just put a helmet on and any sound you can imagine or hope for will happen. Only downside is you lose your mind but it will only boost your creativity. This was a bit strange stuff sorry.

It's sad that certain plug-ins eventually fade away. You almost wish they were made public instead of being pulled, so that people could update them on a voluntary basis.
 
Disco DSP let go of High Life for a while, and it was made public. I loved that sampler. If not for EXS-24, that's probably what I'd be using.
 
Sonic Timeworks had a couple of pretty good plug-ins and I dug the TC native plugs. 
 
And how about Cakewalk's Dimension and Rapture... But Cakewalk still sell those. So I guess there is a market for vintage VSTis. :P

No

Just make sure you keep them in the original packaging.

bapu
Will there ever be a market for vintage VSTis?

Yes.
 
A Virtual one.
 

My bits have certainly aged.