IMHO there will be a global population crash, although have no idea when that will be. Climate change, CO2 - meah, lack of oxygen, yup.
O2 Dropping Faster than CO2 Rising, Even a Pandemic Wouldn't Create a 'Sustainable' Population.
Due to Reptilian Brain problems, there is no future other than humans regressing to animals - possibly ending up eating each other, perhaps that is why zombie movies are so popular, we all know it's going to happen so we lie to ourselves, we make movies about ex-humans so don't feel guilty double-tapping them.
Look at Easter Island. That is human future. It's already here.
"A man in South Hwanghae, North Korea was put to death by firing squad after it was learned he had eaten his two children, the Sunday Times reported, citing a story in the Asia Press. "