I'm not sure you fully understand how Bitcoin works.. If a government wants to shut down Bitcoin they would have to shut down the entire internet - something that is completely impossible as any person can set up a satellite internet "broadcast". As long as one single person in any country that has somehow managed to disable the entire internet in an attempt to "block" Bitcoin has internet access, the entire blockchain can be propagated to every person in that country and transactions can resume as normal. The entire Bitcoin economy can function on one single Bitcoin due to its divisibility, so even if governments at some point in the future were to buy up all but one of the 21,000,000 bitcoins that will ever exist, as long as there is one person that retains possession of a single Bitcoin that refuses to sell, they can split that Bitcoin up (and it will now be worth billions / possibly trillions in a fiat-currency sense due to the government buying up every other Bitcoin) and the Bitcoin economy will continue functioning in milli-bitcoins (mBTC) or micro-bitcoins (BTC). It's impossible to 'kill' Bitcoin without performing a 51% attack, which is currently impossible, and getting more and more future-proof as more ASICs come online. Libertas