It's funny, I was talking about this the other day with someone. This crash was actually a good thing. It allowed people in other countries that were later adopters to buy in, distributing the BTC holdings more equally across the globe.
I don't know that China will be able to crash the markets again with any announcements. They've already done this about 3-4x.
I do think we'll see it happen again if and when the US and the EU put some regulations in place. But, hopefully by that time, more country's citizens are involved and the crash won't be so drastic.
The overall distribution is a great thing because it will give us stability against these types of external influences, which is the entire goal of crypto currencies anyway.
RE: China, Shmyna: Bitcoin Trading Is Way More Distributed Now Anyway