While the fears of not being able to earn money for creative pursuits are a concern, my biggest concern remains around anonymity.
At some point, I fear that participating online with other humans will require "proof of self" and as AI becomes more and more able to generate convincing images/text/video/voice of being human, the systems will ask more and more of us to prove we are real humans which could lead to awful consequences in disallowing anonymity entirely.
That worry remains right up there in my list of AI related concerns.
The parallel concern to that are online communities become tightly gated with stringent requirements of relationships (i.e. invite only, possibly with multiple "referees") and proof of quality in order to participate. This outcome has its merits but can also lead to exclusionary environments which has many downsides, esp for newcomers. It could very well feel like participating in low quality ranked levels of a game for a long time before being allowed to climb out of the cesspool into higher levels where people take stuff more seriously. Not necessarily a bad thing but it's still an inversion of the idea of "participation allowed by default but you can lose the trust you are given if you behave poorly".