Hey there @lukynator. Thanks for the up-vote and comment :c)
Don't mind wise-old-man. Its just a quote-bot. ^_^
Well yes, you make a fair enough point.
Supply and demand do affect value - but surely there is something more. After all - if we look at fiat money - the true value of money could be said to be directly related to what one can trade it in for. :c)