I think you're confusing their market cap with their balance sheet. A $25B hedge fund has $25B in assets, but a $25B market cap does not mean that they have access to anywhere near that amount of capital.

Sure, maybe they could issue a dilutive follow-on offering and bring in some cash, but who knows where the stock price will be by the time they get through the paperwork on that. And they're currently losing about half a billion per year on about $6B in revenue, so I'm not sure that an extra billion or so in cash is going to fundamentally remake the company....