In the first episode, an Austrian Jew named Hans "Jack" Werner chose to escape to America soon after the Nazis annexed Austria. Werner later became a 1st Sgt in the American army during WW II.
He said that almost immediately after Hitler took over Austria, he and his family's bank accounts were frozen.
My wife, who was also watching the program, said the exact same thing that I was thinking. In today's digital banking scheme, this could happen to all of us (including our IRAs, 401Ks, and stocks) in a matter of minutes should the powers that be deem it so.