AI is fed by human input. If humans start and use AI more and more, and less human generated content, then soon AI will be fed by AI content. With each step of the feeding stage will amplify hallucinations and problems. Which will not help in the slightest with fake news and information, as fact checking could potentially be a source of fakes too. Only corporations have the money and resources to create the biggest LLMs, which means they will be the entities controlling everything.
We don’t know if AI will grow exponentially forever. There are lot of downsides and its likely that countries in the world will ban AI. AI is already transformative technology, as we have seen. Partly because the world was not ready for how fast they improved and because no legislation exist. The question is, if AI is a bubble for short time and how long it will last. Maybe the next big AI improvements are done with Quantum Computers in a few decades from now. Who knows.