definitely not. if you are thinking about China, you should remember that crypto-currency cannot be killed by any country. to elaborate more here is a good article regarding what drives Bitcoin value (see https://www.itrader.com/en/article/bitcoin-value)
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You can easily tell that the price of the cryptocurrencies will rise in the next 5-10 years (at least). After that no one can predict what will happen. Those currencies may one day be used as a base currency of the world. Instead of EUR, USD, JPY, GBP ... etc, every country can have it's own different cryptocurrency.
The whole world will be moving from centralization to decentralization in coming future in almost every field of work in our daily life starting from finanace, business and many more new fields of work which are yet to be discovered. Blockchain technology is making it possible to decentralize everything. It is a similar kind of revolution equivalent to invention of internet in 1990s.
But money is the one thing which gives major power and control to a very limited and specific group of people who try to control the world. So these cryptocurrencies will ultimately break the currency financial system to redistribute the money or power among common people from which it will be spreading over other areas to decentralize everything.
It is possible that every country, every community and every company can have their own cryptocurrency of their own.