Capitalism has nothing to do with people controlling their own wealth. It is a system that is defined by who has control of commercial production. And under capitalism, that control is almost entirely in the hands of the capital investor. And since the sole goal of the capital investor is to gain a maximum return on the capital invested, and all commercial production decisions are being made relative t that goal, capitalism becomes antagonistic of every and all other interests related to commercial production. It pits the capital investor's desire for maximum profit against the needs of labor, the consumer, the community, government, and the environment. And as the capital investor gains more and more wealth and power, he uses it to subvert the needs and desires of all these other entities. Thus, capitalism becomes toxic to the society within which it exists.
The solution is obvious: and that is to find and implement systemic mechanisms that will enable all those involved in and effected by commercial production and consumption to share in the control of how that commercial production is achieved, and to what purpose, and to share in the profits it generates. This is generally a socialist ideology and will almost certainly involve systemic government regulation. Which is why the current 'kings of capitalism' work so hard, and spend so much money on demonizing both socialism and government regulation.