I'm just hoping Paul comes up with some type of robot guitar.
Everything goes up and down with supply and demand. A good rule of thumb is anything mass produced is never going to be collectable unless it's something meant to be disposable. Meaning newspapers, paper ads, etc. A guitar were 10s of thousands were made will go down in value even if owned and played by someone famous. The problem with fakes and BS stories often ruin that market. I have been an auctioneer for years and the only thing worth investing in is gold and guns it seems.