Or the way I would think about it is (I think this was a Krushchev quote): You don't convince people there is no imaginary river, you convince people that you built an imaginary bridge across the imaginary river.

So you are never going to convince people that Tesla won't make a fortune on humanoid robots or SpaceX won't colonize Mars. The fever will break when people decide flying robots (or whatever) are a bigger business then humanoid robots or some other company than Space X will colonize the ocean before Mars. You aren't going to convince people to price these things reasonably but eventually the heat will wear off.