I believe the company has trapped itself in a kind of DCA strategy to make up for last year's losses. (which must be in excess of 1 billion?).
So I don't know if they have any choice but to continue investing in BTC.
I'm pretty sure MicroStrategy has some smart-enough people to think that sunk-cost fallacy isn't the way to go. It's simply just the fact that Saylor is really bullish on bitcoin, and the fact that you really can't predict price in the short-mid term — hence MSTR being down.