Who knows if you really want to have much much wealth in the future.

Maybe he would have made the deal of his life the next week if his future me wouldn't have intervened; but 30 years later everybody that ever had more than a million gets killed by the revolutionary movement that swapped across the world after society almost collapsed due to greed.

But he managed to reach a time machine, and now he calculated that if he saves a maximum of 15% he will only ever reach 975000 bucks and therefore survive the revolution

Maybe they're really risk-adverse and don't trust they haven't fucked everything with the butterfly effect just by being there.

So, as it turns out there are a few big reasons.

• it's a cosmic felony

• causing improbable events creates a new timeline which increases entropy in all probable realities, which can have some drastic (and usually negative) effects.

• most time travel agencies (which is what most people can afford) use technology that doesn't actually allow for free will, that's why it's mostly sold for vacations.

  • you can alter/push some decisions, but for most people it's not gonna be successful stocks.
  • older technology was advanced calculation in a realistic simulation. Most people just wanted an old memory or to get closure. Some people just try a different meal or movie choice, the experience is all that matters.

• time mercenaries. We're actually not sure who these guys are, but we also don't wanna know either. Some say they're who cause spontaneous combustion and embarrassing deaths.

• most forms of actual time travel leave the user stranded, with chronic or terminal illness (and sometimes amnesia), and in some cases fading/poofing out of existence when certain thresholds are crossed.

  • On top of that, new timelines of you typically aren't experienced by you. It's a different you. So that was nice of you.

• time spiders. You don't want to know.