Hot payloads for the next few years are network connectivity and compute, two verticals SpaceX has chosen to compete in, which are major sources of revenue. Aside from saving room for strategic relationships with the US government, they can easily utilize all available capacity themselves.
Eventually, anti-trust law and/or another competent launch provider might break that monopoly. But Elon's buddy Don will control the Justice Dept. for a couple more years. And even for the competent, ramping up launch is slow.
Internet satellites... that does look like a monopoly, or at least effectively one.