I'd do it, because with my greater intelligence, I might be able to figure out how to live longer anyway. Or perhaps beat the system that gave the the intelligence in exchange for 25 years of my life. (Since that's vague, I don't know if it's being given by some sort of being or a machine or what. But almost anything can be beaten, really. You just have to know what the consequences are. Scientists actually know how to make humans live forever right now. The downside? You end up as a giant ball of nothing but cancer cells. Not a life worth living, but still, it's possible.)