Is the rise in price priced in?
I believe bitcoin is the only predictable asset in the world. Consider how weather affects commodities, share dilution affects stocks, gold is mined at unpredictable rates and even influenced by technical industry demand (which can be affected by nature, such as with the tsunami.) If it is true that bitcoin is the only predictable asset, then the only variable is crowd psychology. I think this is why we see such a strong correlation between price and search trends.
When people start telling their friends they just made $30 on their $20 bitinstant deposit, the crowd will come running in.
Be careful, and don't get ran over.