I guess it is just the price change then that messes it up for me, to where its not a bitcoin is worth a bitcoin like a dollar is worth a dollar.  I know for so long ya know I can buy a candybar for a dollar, and probably get some change back depending on if its 1990 or 2011 but still pretty damn close, where months ago a bitcoin was nothing, then it was worth 30 bux, then hit 9 bux, then 12, now 15, stablizing in the 12 to 15 range now so its just a bitcoin can not buy the same thing today as it can say tomorrow or next week.  Thats the part that messes me up I guess, is how quick the value is changing daily.