What will happen if China bans CryptoCurrency?
In short term, it will seriously crash, probably below $3,000. It will then recover to some new level, because Bitcoin panic is always overblown.
In long term, new miners will start emerging in places with cheap electricity, because if all Chinese mines will be forced to close, mining will become very profitable, even though the price will be lower. If other major countries won't follow China, then Bitcoin will return to growth after some period of time.