It's just a guess. Here's what I think will happen though. We've got this round of bad news now that will pass. More folks will jump aboard as they realize bitcoin is still here. Hopefully we'll get some good news with a real American exchange this year and just general stability with bitcoin and instability with some foreign currencies.
Going from 1 dollar to 1000 dollars is a 1000 fold increase. Going from 500 to 5000 is only a 10 fold increase.