[katzinsky]

I think you should really ask why you want to be here. The "tech scene" is really all online. I've lived in "tech hubs" and it's not what it looks like from the outside.

Unless you plan on being homeless (which is complicated and very hard even if you're not an immigrant, I know from experience) the high salaries are not going to make up for the high cost of living (especially in SF or NYC) and that would be assuming you had a professional job here (which you don't otherwise you'd have a visa.)

If you're just looking for urban culture there's nothing the US has that France doesn't other than a lot of stuff that's been on television. Maybe take a vacation to Marseille. I always wanted to go there when I was a teenager.