Elon has repeated this over and over. "Everything will be free". The pickup is slow and few take him serious because humans are not good at visualizing exponential growth.
The truth is maybe not EVERYTHING will be free, like you can't own the entire galaxy for example. Nobody can do that. But any single thing that you can own now, up to and including things as big as jets and boats. They will be free to use if not free to own when we more efficiently harness solar power and master automation of both intelligent and physical labor.
The penny has already started doubling. If you know that story then you know how it ends. Amazing abundance.