From my perspective, this case of German government selling seem like a tricky one, it's not clear if they truly sold but rather the cold wallet where it was held was reportedly emptied, they could have moved to their own exchange hence still holding till date.
However, if truly they had sold back then it would be considered a loss to them but a lesson to people to keep holding however, in my understanding, the seized this coins back in 2013 which means from the average price of 2013 to the time of sales it has really be a great from profit already for a government. Bitcoin was at $13 moved to $100 in April 2013 and October $200 so within the time of seizure which I'm not sure the price was relatively cheap and to a $55,000 at the time of sales, isn't that impressive profit?
However it held longer it would amount more but then how sure are we that this tricky governments sold? anyways it's a lesson to some and a stepping stone to making for holding encouragement.
Wasn't there a case of some BTCs that were rather seized than bought off to be sold afterward? It's the question of how these BTCs got to the government in the first place..
The coins where seized from some money laundering cases for running an illegal conspiracy site, it was originally from movie2k
[1] a film piracy site.
[1]
https://finance.yahoo.com/news/german-government-begins-massive-bitcoin-051312544.html