Can they raise rates enough to get to break even before IPO? Maybe. But that would drastically reduce pressure on their competitors. Lyft is growing fast. Uber can really only justify their current valuation if they end up with no real competitors and can extract monopoly rents.
So I think their CEO needs to do a lot more than stabilize things. They either need to find a way to make the current business work much better (something I'm skeptical exists) or to drastically change the business to one where they have more of a moat.
My guess, though, is that they have run out of "greater fools" [3], and that the public market would realize that Uber, at least as currently constituted, is not a high-margin tech company but a low-margin discount taxi dispatch company.
[1] https://www.axios.com/exclusive-uber-financials-2475912645.h...
[2] https://www.wilmerhale.com/uploadedFiles/Shared_Content/Edit...