The current price hike is made in China. Better to look there for hints as to when the bubble will burst.
China has implemented capital controls to prevent individuals from moving large amounts of wealth out of China. See http://www.globalpost.com/dispatch/news/regions/asia-pacific... for some background (or just do a Google search for china capital controls).
A Chinese citizen could conceivably bypass those controls by (1) depositing renminbi (i.e. CNY) into a BitChina account, (2) buying bitcoins, (3) transfering them to a non-Chinese exchange (e.g. MtGox, BTC-e, BitStamp), where they (4) sell them for USD.