a human living to 120, and humans living that long are not the same thing.
There is a case of a woman being pregnant with what's called a stone baby, for thirty years. That does not mean humans have thirty year pregnancies.
abnormal cases do not equate to the new human norm.
I'd say in the next seven years we will see so real breakthroughs that would change how humans deal with outside disease risks that can stain and shorten a life span. It'll likely take another ten to fifteen years for those to hit mainstream markets.
During that time we'll see some breakthrough in organ replacement and cellular aging that won't quite hit mainstream for another ten years after that. so I do think it's possible that we can push to 120s being the new 100s in twenty years. and during the time those are coming on market we'll be making break throughs that a few years down the road will push that toward 180. Especially if we make those leaps to printed organs and improved/ augmented/ artificial organs. The biggest hurdle will be neural health and maintanance.
Once we break that we'll live as long as we can swap out old for new and replenish neural cell supplies and augment with digital memory systems to hold what the meat won't.
Live content within small means. Seek elegance rather than luxury, Grace over fashion and wealth over riches.
Listen to clouds and mountains, children and sages. Act bravely, think boldly.
Await occasions, never make haste. Find wonder and awe, by experiencing the everyday.