Someone are 10000% percent sure that China can destroy Bitcoin. Well, that is not true at all. Even China is famous for its work with it, it doesn't mean that they decide the future of Bitcoin.

However, there is one big factor that can be fatal for Bitcoin.  THE GOVERNMENT!!!  Since Bitcoin is an online currency, if the governments decide the stop the internet, they can easily wipe off Bitcoin. In fact, they can wipe off most of the other banking as well because most of it is online these days.

 They can make minning illegal. If these miners could be shut down, no more Bitcoins will be generated, which could bring down the system.