What if time travel is only possible once? Imagine the multiverse. All possible histories. In a possible universe where time travel is invented it is used, usin

What if time travel is only possible once? Imagine the multiverse. All possible histories. In a possible universe where time travel is invented it is used, using time travel alters the past. The past conditions are necessary for the invention of time travel. Time travel when used immediately facilitates all the possible uses of itself and changes the past so much that it deletes itself. You can use it, but in doing so you remove the conditions for creating time travel. You can use it once and then you and your entire timeline cease to exist. In such conditions I might reserve the use of time travel for things like preventing an unlivable hellscape and not waste it on attending a party with balloons.