The people who are known for this type of work, the Daniel Simon/Syd Mead/Harald Belker types were not people who came out and said they were interested in jobs in designing the future, they were designers who worked day jobs and then over time became known for their futurist work and eventually got hired to do design work for films and other blue sky projects.
There are many people who can declare themselves as “concept artists” who typically have strong art backgrounds, but the ones known for their industrial design worked day jobs and kept the future as their passion until it took off.
Most ID firms need work for today to keep the lights on.
If you want to have people pay you to design something that can’t be sold for value, you’re going to have to put together a sample of work that’s so incredible it starts to work its way across the internet until some day someone catches hold of it and says “wow I need this person to work on this next project of mine”.