It would be like me drawing a picture once per hour. I hand them out to my family members. Some hang them up, some stick it in a drawer somewhere, some give them to friends and one gets sold to a neighbor for $1.
With me making new pictures every hour, the price of those pictures will not decline by $1 per hour. There will be no need to have at least $1 worth of buyers for every picture in order to maintain that price.
I could give those pictures out to other family members or the same ones who put them up on more walls or toss them in the garbage and whatnot.
That 'small percentage' sets the 'price' because it is much larger than the percentage of the exchange market for socks/BTC, web design/btc, MDMA/BTC... etc.
It is the case for every single monetary system. M0, the 'money' that is actually available to be 'spent' on goods and services is a small percentage of that in financial instruments.
Only about 1/6th of Bitcoins are located in the exchanges on a daily basis.
Um, no... That is just what you see in the order book.
1/6th is based on the calculation done in this thread:
https://bitcointalksearch.org/topic/m.548650