Many of those who first settled in California have now left and moved to Texas.
It was pretty easy to move here in the 1980s ( and many came here even earlier than that !) and the early 1990s. And the Rand was just about on par, with the American dollar, in the early '80s. Now it isn't worth much at all.
There are quite a few in the oil industry in Houston. The younger ones or first generation tend to be in high tech.
Elon Musk, for example.
If people are going to migrate to the United States, we should give priority to those who can contribute to our economy and will not be an economic burden.