We are always worried about Satoshi's inactivity, wondering when he might become active and start trading his Bitcoins.
Why would you be worried about Satoshi trading his coins?
They are part of the circulating supply anyway. It's not like he is going to create some new random coins and sell them off, and it is highly unlikely that all those coins in those addresses will be moved
Who will influence the Bitcoin market more, Satoshi or MS,BR?
There is nothing to worry about here. The Bitcoins Saylor and BlackRock are hold were mined at one point and are part of the circulating supply. Why are you happy when they are buying but tend to get worried when they want to sell? It doesn't make sense.