I firmly believe that in the future, what you say doesn't matter. What matters is what you can prove you've said.
What's the difference between the following two? (a) You say something and someone takes a screenshot of it, and (b) Someone just conjures up a fake screenshot of you saying something. These are indistinguishable. With LLM and SD, these fakes will become easier and easier.
The solution is some crypto that allows you to do two things: (a) Be able to prove that you said something, and (b) later revoke it, such that your prove doesn't work anymore and there's no trace it was ever used.