The propaganda of the communist revolution was just a mirage.
The communists confiscated everything of value from the majority of the population and in theory all that became "common property of all the people".
In reality, every valuable property was controlled by a small class of privileged people, who even if they were not the owners on paper, in reality they used and benefited from those properties exactly like or even more than "capitalist" millionaires and billionaires. All the communist revolutions just replaced a few privileged people with other few privileged people and the majority of the people typically became even poorer after the revolution, though frequently some minorities received some advantages after the revolutions, because those in power needed faithful people in some lower jobs, to be able to control the majority.
The only difference between the "capitalist" oligarchs and the "communist" oligarchs is that for the former the amount of money recorded in their bank accounts is important for their power, while for the latter money is of little importance but what is important is their network of allies with which they are connected by family relationships, complete obedience when subordinates, bribes or barter of various favors.