You shouldn’t make outrageous predictions if you don’t sincerely believe they will become true though.

Otherwise you will get what we see in TV everyday. a bunch of people making outrageous predictions just to sound exciting. Then when the prediction comes true, they will claim all the credit. when it doesn’t, they will say “haha I was just kidding of course”

People should state predictions where their view of the probabilities differs from conventional wisdom. EG, if most people think there's a ~20% chance that level 5 SDCs will be available in 2030 and you think it's a 1% chance then that's a valid prediction, even though it's not that exciting to predict something won't happen. If people think there's a 0% chance of hoverboards and you think it's 10% then that's an interesting prediction, even though you still expect it not to happen.

Any serious prediction should include a probability estimate that differs from conventional probability estimates. Almost not one actually does this, because everyone is doing it wrong.