Also, you may want to look into getting Gold bullion suppliers to give out GoldCoins as a promotion.
Maybe Bitcoin will need to be a bit more mainstream for this to work.
That way the Gold bullion supplier will have a much better idea of the potential value of Goldcoin.
However, this is a great idea and one that I will take a shot at.
Perhaps the gold bullion supplier does not have to give them away for free, he could give them a loaded GLD card that costs $1 per 100, that will give them an extra bit of perceived value.
Bullion supplier says to client "We're running a promotional offer today of 100 GLDcoin (the digital currency) for $1"
Client "What's that?"
Bullion supplier "It's just like Bitcoin, and you know how much they are worth"
Client "Yeah I heard they are worth $10000 each"
Bullion supplier "So would you be interested in some goldcoin while they are cheap, we got them in card format, you don't have to be computer savy?"
Client "Ok, how many have you got?"
Bullion supplier "50 preloaded cards atm of 100 goldcoin for $1 each"
Client "I'll take all of them!"
Bullion supplier "I'm afraid it's reserved as one card per client but if you want to get more, there is a link to the gldcoin website on the card where you can purchase as many as you like (while they are available"
I can see it now!
