It’s really hard to do — but there is an answer.
You need to find a founding CEO to join you who can raise that sort of money. Someone who sold her last company for $500m-$1b+.
They can raise it, probably. Once you have a big (or even medium) win under your belt, VCs will give you a lot more money to Go Even Bigger next time.
So that’s not you. But that person is out there.
Go recruit her.