Socialist countries like Venezuela and north Korea control its fiat an manipulate it like any other capitalist country does.
But what are even the achievement of socialism or socialist countries? They are not even practicing as they are preaching, they live a fearful life. They want to run away from trouble but trouble never seize to come
Pyschos like Trump support capitalism.
USA has always been a capitalist country before the emergence of Trump as president. Countries who openly practice capitalism are progressives, they present to you what they want straight up and give you what share you can get too. So before you start up anything, you know what you are bargaining for.
I remember that Karl Marx was one of the strongest proponents of capitalism . He might not like it though but he exposed both the benefits and demerits of it.