But the Bitcoin they own is already unruggeable, isn't it?

The way I see it they're just playing the current game with the current rules but using Bitcoin as a twist. I mean, what's the real difference between what they're doing and a company like Apple, Microsoft, or any of those big public companies leveraging all their power for ultra cheap capital in all its forms?

The difference is with Bitcoin we now have a way to actually quantify the value of something. With Microsoft and others, how can we really value what they're doing? I mean, for real? And in that sense, who's really speculating, Microsoft, Apple et all or Microstrategy, that we can transparently know exactly how much Bitcoin they have, including per share, etc, etc?