Taking "succeed" as living past 120, which for a man born in August 1977 means the year 2097: on the SSA 2023 period life table, of 100,000 US men born, none reach 112; the verified male record is 116 years and 54 days (Jiroemon Kimura, 2013), and one person of either sex has ever been verified past 120 (Jeanne Calment, 122). Past 105 the annual probability of death flattens at about 50% (Barbi et al., Science 2018), so even someone who reaches 105 has roughly 1 in 30,000 odds of 120. Nothing in his regimen has controlled mortality data in people; the only interventions with controlled lifespan data in a mammal are in mice (rapamycin, 23 to 26% more median lifespan in the NIA program), and the first such tests in a mammal that lives with us are the dog trials reading out around 2029 to 2031, which is where a regimen's effect on a survival curve can actually be shown within a few years. The arithmetic with sources (mine): https://w0lph.github.io/k9/why-dogs.html?v=2

Why the path to human longevity runs through dogs

Computed from the cited life tables and trials: a lifespan answer takes 4.6 years in dogs and 21 in people; dogs share our environment and diseases, lifespan has already been extended in dogs, and a regulator has accepted lifespan extension as an indication for dog drugs.

https://www.bbc.com/news/articles/cz7rxy21lxwo

I don't believe Johnson is a billionaire.

I think this would be more interesting if the close date was closer to when you expect him to turn 120 years old.