We all travel in time: at the rate of 1 minute every 60 seconds.
Using relativistic effects (and a LOT of energy), it is possible to 'travel into the future' and not age as much as those where you started out.
There is no known way to age *faster* then your original start point.
There is no known way to go into the past light cone (which would form a closed, timelike loop).
It isn't simply a matter of technology. We haven't seen *anything* undergo a closed timelike loop. Not a proton, not an electron, nothing.