For $500,000 invested in America one can obtain a green card. The only ones with that kind of cash are the Chinese. They are buying up lots of properties in the Seattle area. And by cash - I mean cash. My real-estate agent said it happened a couple of times where they brought suitcases full at the closing! (Now she makes sure to tell them to use a cashier’s check).
Where did you find that information? I am aware some countries will give you residency if you buy property, but was not aware US has such law on books.