Not possible.
Humans are always on the brink of discovering immortality, which is just beyond the cutting edge of current science. Now, with Big Data, it’s brain uploading. Recently it was the human genome project, earlier still, transplants, pharmaceutics. During the Conquista, with the Fountain of Youth, it was cartography.
100% of people who were born will die on this planet.
Nah, it’s not brain uploading anymore, we’re back to biology again. Right now we’re mostly getting tech to make being old suck less. It’s at the stage the robot arms controlled by monkeys in labs were 10-15 years ago, so it should actually arrive, just like nervous-system-controlled prosthetic limbs are now a real thing. Clearing Alzheimer’s plaques in mice and the experiment with old and new blood from joined mice rejuvenating the old mouse are examples, as well as tissue engineering for growing new organs. Getting stuff for humans out of CRISPR Cas9 will take a bit longer, probably another decade before it reaches that stage.
It’s unclear whether aging escape velocity will be reached within our lifetimes, but it’s still within the realm of probability, supposing the countries advancing the current technological edge don’t crash, and… they may not actually crash. Renewable energy is still picking up even as subsidies end, and we have enough uranium to power industrial civilization for 3,000 years in the oceans, if we must resort to it.