Its my belief that the blockchain technology is resistant to cyberattacks, in that the computing power required to falsify or edit a written block on the chain, is unattainable. Bitcoin is the most secure chain because of the amount of distribution (participation; nodes) it enjoys. Government can have a limited effect on its use, by suppressing it or banning it, but similar to torrents and Mary Jane, that will only have a limited effect. Some countries will support it, and like States that pass the legalization laws for cannabis, they will grow their economy, and those that have a ban will eventually get on board or suffer the lost taxes. A country that can grow its economy without bankers syphoning profit for doing literally nothing, will expand quicker giving it an advantage in production costs etc.