I think 209K BTC is too much, if we look at the total of the BTC confiscation by the US Gov:
Silk Road 69,369 BTC
Bitfinex Hack 94,643 BTC
James Zhong - 51,326 BTC
In total around 215K of BTC and the estimate balance now is 164K - dang it almost 1% of all BTC currently in circulation.
Blackrock and MicroStrategy might be buy more cheap bitcoins soon ...
source: https://dune.com/21co/us-gov-bitcoin-holdings