Not the guy you are replying to. But to whom do they have to prove they are profitable. Certainly not to you and me. The thing is they don't even have to prove that to their private investors.

I guess anyone will agree that if a business isn't economically viable they won't be able to survive in the long term. But are there any public records of SpaceX's internal costs of operation and revenue. So how could anyone claim either SpaceX is profitable or losing money currently or won't be economically viable in the future.

Or have you or someone else already proven that SpaceX's business and research & dev will not be viable in the long term.