I admire your optimism mate but can't agree with the logic you're applying.
Its the volume of collectors willing to pay money that will affect the value of records, which is what we're talking about, the number will inevitably decrease - lets not beat around the bush, a lot of us will be dead in 10/20 years!
Best sounds on the planet? Of course I agree with that but again, we're in a tiny minority that will become tinier due to my point above.
People put forward the argument of new/younger people coming along and worldwide interest etc but i just don't buy it