I would argue that basically everything happening with Bitcoin is good for Bitcoin. We need to get a sense of the range of possible states and to see how it functions in them, in order to build confidence in it as a robust global money.
Why does any one care, Jupiter may have most of the mass in the solar system, does that matter? 5 nation states own most of the Fiat dollars along with few institutions...that is how it goes.
I don't think it's a bad thing. People hoard all forms of wealth, this is no different. I think it helps perception of bitcoin being valuable, so that's a positive. Plus, if they're holding them in cold storage and not moving them, it makes my stack that much more valuable because the supply is effectively lowered.
I don't see what's wrong with it. First off Bitcoin isn't a PoS network so microstrategy essentially has no control over the network. Compare that to other networks where they could have a significant stake in consensus indefinitely with this kind of money.
It doesn't change anything if they have1 sat or 140.000 bitcoins. They're in the business of being as wealthy as possible...in USD. So, to me, it's OK they have that amount.