I don't think China was the cause of the 'recent' crash. Bitcoin has definitely been in a bad downtrend for weeks now. I'm sure these 'news' about China didn't help but that's not why Bitcoin has been doing bad all these weeks.
So you believe the increase from $7400 to over $9200 was pure luck? Was it something normal? and coincidentally increased from $7400 to over $ 9200 just as the president of china talked about blockchain and days ago china said it is still implementing hard measures against bitcoin and the price has dropped to the point of going back to $7400... This is not coincidence, even if some people insist not see the obvious that China has a large influence on bitcoin price. when President Donald Trump and the Chinese President intensify their trade war, Immediately the financial markets react, why would we not believe that the statements of the Chinese president affect the price of bitcoin?