I don't think bitcoin will die but it will create a big hole on the system of cryptocurrencies as majority of crypto-miners are from China.It will really have an impact on the transactions of cryptocurrencies,transactions speed for sure will become slower and fees might get higher if its government imposed a total ban. Let us also forget that a lot Chinese are into cryptos so they will for sure sell all their coins and that will make the market unbalanced,if that happens we might see a huge drop in the value of all cryptos.
But definitely Bitcoin and other altcoins will not die and it will continue to exist and find a way to correct  this imbalances.