Because they would need to inform the public that they are going to spend tax payers money to buy bitcoins. Think of the discourse in public and media this would trigger. How would they explain this to their conservative voters? How would central banks react on such a move? You will probably say that they just did it in secret (even the central banks themselves), but then again, this would be 100% dynamite if this could be reveiled. (I´m having european governments in mind while writing these lines).
Because they would need to inform the public that they are going to spend tax payers money to buy bitcoins. Think of the discourse in public and media this would trigger. How would they explain this to their conservative voters? How would central banks react on such a move? You will probably say that they just did it in secret (even the central banks themselves), but then again, this would be 100% dynamite if this could be reveiled. (I´m having european governments in mind while writing these lines).