HHhhmmmmmmmmmmmmmmm....................
Well, my logical/serious answer would be no, I don't think time travel will ever exist. Time is just like Gravity or space. It's a A major law of Nature/Physics.(IDK if I worded that correctly) You can't reverse it or alter it in any manor, just like gravity. It's unchangeable. But if it did exist, to be perfectly frank I don't know if I would use it or not.
My non-logical/serious answer would be I would use it, I would go to the 60's, 70's, & 80's And visit and meet with all of my favorite bands. Since 80s rock is the best!