This is a common practice. Visited my brother-in-law at his alleged new condo in FL. The condo was really nice. Complimented him on it, and he said well they are just letting me use this one until ours is completed. Turns out theirs was in the building next door. The building next door at the time was a hole in the ground.
Half a million dollars for a hole in the ground. Building was completed, he decided he didn’t like it that much and sold it for fifty cents on the dollar. Couldn’t have happened to a nicer guy. (sarcasm)
The inference of the article was that they assumed the US, even during a collapse, would be safer than their home country. All felt safer stashing assets here than there.