This particular idea rather has me scratching me head 
as I can see a small publicity value to this idea 
and no other practical one at all. 

The idea being to produce physical bitcoins that are partially gold. 
That sounds like a reasonable way of getting a bit of publicity...

http://www.forbes.com/sites/timworstall/2013/12/01/todays-strange-bitcoin-idea-the-gold-backed-bitcoin/