As far as I know, this issues has been over. US Government only moved the Bitcoin in to new wallets, they didn't sell the Bitcoin into market. So, what we must be worried with this? I think we have no reason to feel worried because it won't influence the price in the market for a long time. Even if there will be price decrease in Bitcoin, it should be for temporary only. If we are long term holders, just don't think about it too much. 
From on-chain data, we only know that the US government is moving their BTC without knowing the exact purpose. They might just be moving it to ensure security, or they might be transferring it to OTC and selling it to whales to get fiat. However, the initial reaction of investors upon hearing this news is to worry about the possibility that the US government will sell BTC, causing BTC price on the market to decrease.
Humans often worry about events that could harm their personal assets. When this worry resonates together, we have panic in the market psychology and the price of BTC can go down. Therefore, whether or not the US government actually sells BTC, as long as investors are worried about it, it is enough to cause BTC price to decrease and create real losses for investors.