Mike Hearn via bitcoin-dev wrote:
>
> * Most governments can easily spend enough money to do a 51% attack,
> especially if they can compel chip fabs to cooperate for free.
> This attack works regardless of how decentralised Bitcoin is.
>
> * Any government can end Bitcoin usage in its territory by jailing
> anyone who advertises acceptance/trading of bitcoins, or prices in
> BTC. Because merchants /must/ advertise in order to alert
> customers that trades in BTC are possible, this is an attack which
> is unsolvable. If ordinary people can find such merchants so can
> government agents.
>