The problem with that is, say you were Chinese and had bitcoin. You now can't trade it on Chinese exchanges for yuan, once they have been closed in three months time. And thanks to the Great Firewall you can't access the western exchanges and sell for dollars (and in any case can't open a western bank account to pay those dollars into). And you are scared that your govt will prosecute anyone caught with bitcoin.

You have two choices - sell now while you can (and the price on the chinese exchanges is lower than on the western exchanges, indicating this is what people are doing). Choice #2 is to hold and take a trip to Macau and sell the bitcoins in person to someone from local bitcoins, to cash out later. Most seem to be doing the former.