You obviously haven't been reading financial news. Bitmain is almost bankrupt. Their supposed IPO is now considered an exit scam. Their mining machines sell for basically nothing, except for the Z9 series. They are bleeding cash and lost billions by converting their money into Bitcoin Cash which then crashed. Innosilicon has a better chance to survive.
While this may be true, let's not forget that Bitmain now also has investments in other hot innovations like artificial intelligence. Given they do really lose a lot now that their "precious" bitcoin (tr)cash is running out of gas, i don't see them going bankrupt anytime soon.