The earth won't cease to exist anytime soon.
Humanity is on the edge though.

Many people today feel isolated and disconnected in many ways. Thousands of us live in close physical proximity with thousands of others (for example, in apartments and on trains and buses), and yet we feel isolated and lonely. Neighbors are strangers. Adjacent countries are mortal enemies. All of this division inevitably leads to the fall of us all.

dyson sphere/ring ftw

Hopefully humans and then evolution will produce a new dominant species.
Unless we advance fast enough and are able to get to one of these planets than can support life.

Fortunately, natural selection favors variety and there are still a great number of adequately social individuals that would make it through a 'bottlenecking' event. But, I do see population decay happening soon maybe.

humans weren't here in the beginning and won't be in the end. we aren't as durable as the other species on the earth, like the turtle for example, which is why we've relied on technology
when technology fails or most of civilization is wiped out leaving a handful of individuals in our species (like has happened before) I doubt they would be able to survive the wild , because most of us lost our "cavemen side" and are so dependent on having a building to sleep in and food provided that lasting even a week would be improbable. If there is a significant catastrophe that kills around 90% of the population I can almost guarantee we wouldn't survive, unless the survivors just so happen to be like bear gryliss and bruce willis or some shit I doubt humanity would be able to recover from scratch.

and even if something major doesn't wipe us out its just a matter of time before co2 levels get too high, holes in the ozone get larger, our planet somehow drifts or is knocked too far or too close to the sun
bam, that kills life within a short period of time with the rock that once sustained it still intact, humans and most animals die first,

If humanity wants to exceed the lifecycle of the earth or our solar system, it should think about meaningful ways to sustainability.
And based on the rationalism I'd say humanity will die first.
Humans are simply too primitive to travel universes and stuff. Even if we have the power to "create" perfect humans, we will still suffer and need so many ordinary things.

My idea would be a species that may rely on very few things.
Based on technological evolution this is not so far away, except we exterminate ourselves first.
Don't compare this to todays roboters.

Are you sure this is our first planet?

Based on the fact that our skelettons are very similar to the living animals on this planet - yes.
Also we found remnants of our ancestors