I’m a little shocked that this hasn’t been happening more:
Engineers at Russia’s top nuclear research facility have reportedly been detained after they attempted to mine bitcoin on its computers.
Several employees at Russia’s nuclear centre in the city of Sarov have been detained after making “an attempt to use the work computing facilities for personal ends, including for so-called mining”, a spokeswoman for the centre, Tatiana Zalesskaya, told Interfax news agency.
Various governments have huge chunks of computing power. I would expect (recall, I spent some time in Russia, I have a view of the use of govt assets driven by experience) more of this to have been happening.