This is how the ultra-rich do it. All their wealth is not "owned" by them but they control it.
John D. Rockefeller once stated, “Own nothing, but control everything.” Basically what he meant was ‘what you don’t own can’t be taken from you’.
At least they are following the "You will own nothing but you will be happy," mantra.
Perhaps he is trying to avoid this. -On 20 December 2017, President Donald Trump signed Executive Order 13818, “Blocking the Property of Persons Involved in Serious Human Rights Abuse or Corruption.”