Single use time machine into the past

Say you had a time machine that had only one use and you can only go to the past, where would you go and why?

just a couple years

pick up more bitcoin

I would destroy it, no man should hold such power.

What if you couldn't change major history but you could still live out life in the time period?

4AD is literally the best year to be alive if you make it past 10 as a Roman citezen

1936 Germany

I'd go back and kill all the earliest humans so they couldn't infest this earth

Wouldn't doubt it especially if you could make it into a major sphere of influence or at least be rich.

I would ensure that Poland allied with Germany before WWII.

Why not just burn Africa off the map before the niggers spread and infest the world?