Nobody can shut down Bitcoin all because this is using Distributed Ledger Technology and is built for the same purpose making it censor-free. However, we know that trading can be affected if a country is not allowing its buy, sell and use just like what is happening right now in China. And that is why even if there is going to be strict regulations in markets like the USA, we still have to be thankful that it is not the policy of the policy to have cryptocurrency generally banned. Going against governments' power can be a distressful thing, and we know how people in the government can be using their vested power to make things so difficult.