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If so I would travel twice, the first time to achieve vast knowledge and the second to go about 70 years in the past and make some lucrative business deals and steal 'future' discoveries.
Although this brings up the question of "Well Will, if you travel back into your own past and age appropriately while retaining the knowledge you have now... how are you going to travel to the time before your own birth and not cease to exist?" The answer is simple, this is a hypothetical situation and one could make the assumption that if you had the technological capability of time travel you could also have a way to get past this particular paradox.
Again, you can't violate physics (excepting the time travel itself). A thought experiment is pointless if you throw in magic powers. That being said, since you're traveling into your own past body and aging is a physiological process, it stands to reason that the time spent in the past doesn't accelerate your age -- when you're done your journey into the past, you return to the present at the same instant you left, possibly without anybody noticing (aside from any changes to your posture and bearing), so years spent traveling through your past != fewer remaining years until death.