Also, I don't see why it's important news, to be honest.
The only importance of this news is that a little more time passed between this and the last investment than usual, more precisely the previous investment was
13.09.2021 - 5050 BTC (check @fillippone spreadsheet) + but there is also a difference where the money came from explained in this
post.
Even if Microstrategy dropped their $3 billion worth of BTC in one go, with trading volume of Bitcoin for the last 24 hours being almost $36 billion, how much of a difference would they have made? A short-term significant drop, perhaps, but it Bitcoin could easily recover from that in days.
I wouldn’t agree that it would only have a short-term effect, because it’s not just a matter of someone selling 50 000 BTC, but if MicroStrategy did it, it would create a real panic in the market at the moment it was made public. Of course, the market would recover, but not in a few days, because investor confidence would be quite shaken.