Bitcoin is not connected to any region or financial institution. There are dozens of popular exchanges, and even if they don't exist, all you need is a wallet and network connection to be able to do bitcoin transactions. The blockchain built above does not require an institution to operate it, and indeed is the complete antithesis of such an idea, operating as a general ledger rather than a private one. Without a central location to be closed, meaningful crackdown must be a global effort. Even if a country somehow prevents bitcoin transactions from happening within their borders, a simple VPN or proxy system will allow users to operate internationally with little problem. If the government can effectively stop peer to peer networks, they will close illegal practices of torrent sites more than a decade ago. Even the success of torrent sites like the hydra is not a perfect analogy for bitcoin, because the legal status of cryptocurreny is much easier to debate. A fairer comparison is what is called the dark web. Although individual sites, servers and people involved with various activities there can sometimes be arrested for illegal activities, it would be ridiculous if the government could regulate the entire network. Trying to ban bitcoin or set it up in a way that allows true supervision to be much the same. Not possible at the technical level. Even tracking individuals who have a particular wallet is difficult. Although the public blockchain allows the government or law enforcement to track certain bitcoins, binding it to people in the real world is very difficult. The owner can hide his identity with VPN, Tor, or even physically move his wallet in the form of cold storage (offline), making it invisible to the world.