Don't they usually just sell it off when they confiscate it?
I think when silk road got seized, they held the coins for investigative purposes, and then ended up auctioning them off in bulk to any bidder at a much later date. I might be remembering things incorrectly though, someone feel free to correct me. I think Bitcoin is too small and insignificant for governments to invest in it.
If you're asking about the FBI I think the only coins they are holding are the seized ones but these will be put on auction sooner or later.
Maybe if Satoshi is really a government employee and it's all a big scam... Am I going too far?
in the grand scheme of things, i suppose its not, with a market cap (in usd) of under 70 billion dollars with 15.6 million coins in circulation. compare that to a ~4 trillion dollar annual budget for the us government. The theory of satoshi being a government agent and bitcoin being a secret project has come up before, but i personally dont think there's any actual reason to believe this was ever the case; if it was though, we'd be living in a much more digitalized world and bitcoin would have a much stronger economical presence. If you're asking about the FBI I think the only coins they are holding are the seized ones but these will be put on auction sooner or later.
Maybe if Satoshi is really a government employee and it's all a big scam... Am I going too far?
We know that the US government made TOR and bitcoin was first huge on TOR network (deepweb) and also the maker of bitcoin is not known. Why's that? Well maybe that's because they don't want us to know rather than the creator likes being anonimous.. Who knows, but it's interesting to think about it. :p 
