Bitcoin doesn't care. MSTR could own 50% of the supply and still wouldn't have any more influence on the network than it currently does.
In the interim, the arbitrage opportunity to accumulate BTC using the fiat capital markets is inevitable. Saylor just pioneered it, but it was bound to happen. Hard money wins. I don't understand why so many bitcoiners get so rattled over this, Saylor is literally building a bridge between BTC and trillions of fiat - that is good for bitcoiners unless you have something against NgU.