off to your own time, scrounger

Don’t expect the future to save you. The only thing that would motivate a time-traveler to come back is if the future is worse.

“Is there a cure found for my cancer in the future you come from?”

“What? Hell no. No one lives long enough to get cancer. The last doctor was eaten by spiders right before I jumped out of there.”

Any time-traveler you meet is a parasite and worthy of contempt.