You need to take an accounting course and learn the difference between income and assets.  We tax income.  We don't tax assets (other than property taxes).

That said, knowing that when the Leftists run out of income to tax, they will start going after assets, and when they can't accomplish it through the political process, historically, they kill those who resist.  With that in mind, somewhere between $25 Trillion and $30 Trillion has been moved out of the jurisdiction of the United States, legally.  The "Panama Papers" gave us a glimpse of that.