Easy.

First buy up a bunch of housing east of the California fault line and then with the billion get nuclear missiles that I can use to trigger the fault and push California off creating a new coast line and water front property for a brand new tech center of the world.

If I have any left over I can look at maybe getting a space crystal that rapidly grows in water to create a new island that true foreigners won't be able to step on without hurting themselves.

You got to learn from the best.