Bitcoin is not a currency its a steak. My corner grocer had T-bones on sale last week for $5.99 a pound, this week theyre $10.99 and next week they might be $6.99. You are never going to know the exact price of btc or steak until you check the price today. Welcome to the world of commodity trading; glad you could join us.
I guess that's why we don't barter much anymore. Bitcoin would be more useful as a currency than a commodity. I'm just trying to offer a way to make it so.