Re: No
No sane western government - or even the ones we have - are going to use a widely distributed database for something as important as 'money'.
The main / only attraction to this is the thought that government will be able to see - ie tax - everything going on in the economy.
For obvious reasons, you don't want everyone to be able to see that your wallpaper cost £How Much!?! and was paid for by the newly enobled Lord Donor.
Similarly, no sane western government is ever going to adopt Bitcoin, with about 1/20th of the entire supply owned by someone unknown who may be dead but certainly isn't Craig...