Disagree. When I can get a bank account with a UK bank denominated in bitcoin (at whatever cost), then it's too late to invest speculatively. Until then, the barriers to entry are exerting downward pressure on the price.
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.