Asset bubbles are not the exclusive domain of stock exchanges and shares. "Real" assets include land and the property built on it, machinery, and other tangibles. "Financial" assets include anything that stores value and can serve as means of exchange - from cash to securities. Even tulip bulbs will do.
NRA or Non Residents Alien is a widely used term, which refers to the non-US citizens, having no residential base in the country. It is generally put in to the use by the countrys banking sector. Why does a NRA require a US account? Lets try and analyze the various benefits that everyone around the globe can extract from a US account.