The world ends every nanosecond.

What will the humans do in the future?

Well, I think it's safe to say it will do more than deers or cows will do in the future.

Will the vicious predator known as human be nicer in the
future?

Well, has the human become nicer in last thousand or so years?

And btw, what would a nicer human be like?

The human creature will probably continue to bullshit.
So will that mean that human will think humans have became nicer in the future?

Which brings us to:
Will the human become smarter?

Has it become smarter in last thousand or so year?

Apparently human's IQ has been rising for decades and perhaps for thousands of years.
But does that mean the human is smarter, or does it merely mean that generally it's more excitable due mostly to it being better fed?

A more excited vicious predator might be more interesting- as in, who the hell knows what it will do next.