Damn!
How do you get people to give you 5 billion dollars? I've seen some ponzi schemes and scams but they were usually in the millions, not billions. Even the famous Charles Ponzi stole $15 million.
Probably this is a big syndicate that have rotated in China. And even though they've got a lot of money, they haven't been aware of the red flags of these ponzi scams that have been offered to them.
She was delusional if she thought she could launder that much money. It's easy to hide $100k and not pay taxes from it, but once you start getting into millions it becomes much harder because expensive assets like real estate and cars can be registered. Someone has to pay property tax, get the required paperwork.
That is what typically they do, it's a big network of these fraudsters and money launderers. And it's true, they will still be required to sign papers.
You can't have 10 different names to hide 10 purchases because that's eventually going to come to light. You get into 100m+ and it becomes close to impossible.
And what the next thing they do is to hire a dummy, a dummy that will serve as owners of those. I think this is common for most mafias and big scam networks.