Like all monetary systems, a cryptocurrency is simply made up
  - and in the case of cryptocurrency, the medium of exchange has no underlying value/usefulness (as opposed to e.g. gold).

Therefore it is natural that any government with an already functional monetary system will not adopt an existing cryptocurrency - because as such, they would just be paying to buy into someone else's made up value. Instead, that government can just create their own cryptocurrency - and mandate that it is the only legal one to use. They they become the ones who receive payment for something that is created from nothing.

There is something fishy with this and other clips from that Youtube account. The sticker in the windshield and the non-peeled touchscreen still with the NA-sticker shows that this car has not actually been delivered to a customer. Also, the driver profile is called 'Profile'. As such this seems to be a demo car that somehow has the FSDBeta enabled and which is driven by someone who has not agreed to its conditions of use. Further, upon delivery Tesla will make sure the firmware is up to date. This step has not happened, so we do not actually know that the version really is what the driver claims.

One morning at the office all the files in the home directory of a colleague were missing. After digging around a bit he concluded that someone had apparently mkdir ~/.remember_to_log_out mv ~/* ~/.remember_to_log_out

http://xkcd.com/323/

OK, but there has been at least one attempt at planting a portable back-door in the linux kernel: http://kerneltrap.org/node/1584

Success is a mental transformation.
A. Vayner.
PS. Impossible Is Nothing!