they can't control or regulate it.
i think the best scenarios for them will be that All countries secretly make a meeting in order to shut down bitcoin.
it will break down like this, they will find them BIG pools IP's, big mining pools in each country and disconnect them all at once from the internet retaking over mining and disrupting the bitcoin network.
they wont have to shut down the whole internet but only certain parts of it (mining one's).
i think the solution of it is difficult but it can be done,
everyone who supports this this technology and bitcoin will have to buy and addition to their PC, a small mining equipment even 5GH is enough just to support the network.
what do you think ?
I think the premise bitcoin will be worth 10 trillion dollars is ridiculous fantasy.
in present day terms, that would mean 1 bitcoin = $1 million.. it's so far out in the future that it's not even worth speculating over.