[Tawa]

Well, Read This:

Tourism in time
Stephen Hawking once suggested that the absence of tourists from the future constitutes an argument against the existence of time travel—a variant of the Fermi paradox. Of course this would not prove that time travel is physically impossible, since it is might be that time travel is physically possible but that it is never in fact developed; and even if it is developed, Hawking notes elsewhere that time travel might only be possible in a region of spacetime that is warped in the right way, and that if we cannot create such a region until the future, then time travelers would not be able to travel back before that date, so "This picture would explain why we haven't been over run by tourists from the future."

Well, The Idea That We Don't Have Tourists From The Future Is The Thing That Convince Me That There's No Time Travel To The Past... But I Think That Time Travel To The Future Might Be Possible Because Of The Relativity That Einstein Prooved