It’s no big deal. There is lots and lots of American land. They can’t carry it off.
American land is one of the best and safest investments in the world.
The problem is not land ownership but rather land usage. It is the usage that must be monitored and perhaps regulated
I am reminded of Japan in the 80’s. The Japanese had lots of cash that needed a safe place to be invested. They bought real estate. Guess what? It’s all still there.
Look up the word “invasion”.