Be it 1 bill or 763k of $, the effect would remain the same for the people that follow headlines rather than technicals or BTC overall, don't you think?
~2 days later and the market has not shown any kind of reaction to this news considering price movement is the same as before. This means regardless of its size, this article is as meaningless as the exaggerated title OP chose

Are you surprised about that? Od course you won't be surprised as we all know that the US don't buy bitcoins, for all the bitcoins in their custody has been those they seized as a result of some relations with alleged criminal connections to the coins. If this news were coming from countries like El Salvador or
PalestinePakistan we would have seen price taken some uptrend move because they are countries that actually buys and stack BTC.