Definitely the down side of capitalism if you ask me. Capitalism is the right to build personal wealth, but when great personal wealth spills over into great political control or controlling of the national debate, whatever you want to call it, then capitalism has gone too far. We do need firewalls against people of great wealth who can simply use their money to corrupt our values i.e. freedom of speech, and other laws going far beyond i.e. the enabling of an insurrectionist to push lies about elections and lies about our entire election process.
By owning twitter, this guy can and will enable extremist and conspirators to bleed into the mainstream or as Fox news calls it, the alternative facts. No telling how bad this could get or how far it could go, and simply because a rich guy prefers lies and delusion over truth and fact. Pretty dangerous if you ask me, and this is the downfalls of capitalism spinning out of control.