Today we have the first country to announce that it owns Bitcoin.
If you have information about other countries, add it below.
The list is far larger.
United states have already seized some bitcoins from criminal activities, which they own now. I think that it is also likely other countries are doing the same:
his week, a small platform for safekeeping cryptocurrency called Anchorage Digital announced it had won a contract from the Department of Justice to store and liquidate digital assets that federal law enforcement seizes following criminal investigations.
I also found this link from Investopedia, whcih mentions United States, Bulgaria, Sweden and North Korea as hoarding bitcoin.
The Bulgarian government seized more than 200,000 bitcoins from the results of an organized crime crackdown in May 2017, according to reporting by CoinDesk. The sting resulted in the arrest of 23 Bulgarian nationals and the seizure of bitcoin valued at $3.3 billion at the time. As of late November 2017, the Bulgarian government declined to comment on what would happen with the seized digital currency, indicating that there was an ongoing criminal investigation.
Sweden
The Swedish government made digital currency headlines in the fall of 2017 when it decided to auction off some seized bitcoin as well. The value of the seized assets were significantly smaller than those in the Bulgarian incident, as the Swedish Kronofogden announced plans to sell just 0.6 BTC, worth about $3,200 at the time.
United States
The United States has also taken part in auctions of bitcoin holdings that were seized in criminal investigations. In late 2015, for instance, the U.S. Marshals Service auctioned more than 44,000 BTC which were seized from Silk Road operator Ross Ulbricht. This was the final in a series of auctions for a similar purpose.
North Korea
While the above governments have publicly auctioned bitcoin holdings that were seized from criminal activity, North Korea's government has shown some signs of actually collecting and hoarding BTC.
these are situations where the government seized BTC. they did not buy it but were taken by force because of criminal activity. it's still assets considered theirs now so yes they own coins. the Chinese government must have seized a lot of coins, it is not however reported though. but i suspect this country has confiscated more BTC.
El Salvador will be wealthier if they buy the dip every time, this is like Saylor's strategy.