[wozniacki]

  A major government wants to store $30 billion of their
  own currency in a financial product that will decrease 
  in value against the dollar more slowly than their 
  currency. Is there an app that helps governments store 
  30 billion in assets (or are we naive enough to suggest 
  that bitcoin is a smart investment?)

Could someone, well versed with central banking methods or fiscal/monetary policy, explain how this works?

I'm not very monetarily/financially literate.

Why would a country invest in some product that decreases in value in the first place - even if their own country's currency is slowly but surely losing value?

By "decrease in value", does the author mean temporarily or in a slow downward trending gradual spiral ?

Why not pump the same money into something that is likely to grow in value, like rare earth minerals or into companies that hold rare expertise in battery technology or something similar?

edit: clarification

[gclaramunt]

because of risk, is in everybody interest of playing as safe as possible with the government assets (unless you channel them to your Swiss account using your cousin's fake company as a front