I like to look at past trends and the history of bitcoin has been phenominal. What price do you think 1 btc will cost one year from today (feb 2015)?
From seeing the past trend it seems to be exponential to me.
You might do well to consider the possibility of Bitcoin not even existing by Feb 2015. I am not saying that I think this will happen; although it is certainly possible that this star has shone too bright too soon, I am just saying that it might do your frame of mind the world of good to consider this possibility and the many ways that a Bitcoin death event might be brought about.
If you came to Bitcoin back in October or November with your obvious level of enthusiasm and anxiety to get invested. You would have done very well. But it is a very different market right now. Instead of dreaming about exponential profits, try focussing on learning to read these markets and choosing a good entry point, and then nursing your position and ensuring that you aren't going to go underwater on it. Let Feb 2015 take care of Feb 2015 itself.