The idea of a private citizen owning land was not generally accepted in the medieval age of kings. Only lords and other nobility could own land back then. Technically, the king owned the land, and the Lords were simply stewards of the King... probably indirectly (King -> Count -> Lords)
Eventually, real estate could be owned by the common peasants and merchants, but that starts to get into modern capitalist style society.
Tulips changed they way some of the Dutch live. They still have 11,000 hectares planted and grow 4.3 billion bulbs per year, 381 years after the so called bubble. I wonder if ETH and TRON will be about in 381 years.