If you own enough of these automated factories, you don't need to sell anything at all. Just produce whatever luxury item you want, in addition to mundane things like food and shelter (in the form of caviar and villas, because why not?).
That will mark the time when technology is advanced enough that humanity will fracture with small independent groups going out and fending for themselves, possibly in outer space. Some SF scenarios call them "great houses", because they somewhat resemble feudal kingdoms where a kind of extended family rules, except there are no peasants.
That will mark the time when technology is advanced enough that humanity will fracture with small independent groups going out and fending for themselves, possibly in outer space. Some SF scenarios call them "great houses", because they somewhat resemble feudal kingdoms where a kind of extended family rules, except there are no peasants.