Without trying to be too snarky, the only thing anyone can say with certainty is that Bitcoins value will fluctuate. How much? Nobody knows. I am, as we speak, trying to find a currency arbitrage expert to help me understand the implications of BTC volatility strictly in terms of trading it like a security. In other words there are people who do this for a living on Wall Street and other places, with trading models. Those people will figure something out and the rest of us will guess.