I'd say 1000x really is too hard to process. We hear the words, millions and billions and sometime trillions thrown around in the modern world. I'd guess most people process "billion" as "a lot more" than a million. Hell, we can hardly relate to 1,000,000 IRL.
It really is hard to get our monkey brains around, didn't evolve to deal with massive numbers.
EDIT: Forgot to add this anecdote.
Read a story where a local elementary teacher had a project for her kids to come up with a million bottle caps. Idea being to show them what a mind-blowing number a million is. Yeah. You could hide several bodies in that pile. It was freaky.
It's easier to visualize this way : you have 100 dollars in your pocket. There is 10 cents on the pavement. Do you care about those ten cents? Probably not. They are just a rounding error.
A nice exercise is to take a small amount, like 50€ or maybe 1000€ if you have a steady job, and think how that would change your life if you were given it.
Then double (roughly) and think what you can do with that much money.
Repeat until you can't really know the difference.
The best way to fathom this is to have a crippling addiction to Runescape. You can pretty much earn your first million after a week or two of play, after a certain point be able to earn few million a day. However, it can take multiple years for people to earn 1 billion gold, which is needed for some of the strongest equipment in the game.
I saw a post the other day, people getting mad at some ceo making 30million a year.
So in ten years they made 300mil, in 100 years the've got 3billion, after a thousand years they've made 30billion... so after like five thousand years, they'd see eye to eye with bezos...
You go from -more or less- 11 days to 11.000 days. At -say for easy numbers- 333 days a year, you get to 11.000 / 333, which is about 100/3 which is about 30, 30 days...
Back of a napkin calculations greatly help in getting a better sense of these numbers.