> People move in and out all the time as a result of ordinary life changes (rising income as you enter prime working years, selling assets to buy a house, selli

> People move in and out all the time as a result of ordinary life changes (rising income as you enter prime working years, selling assets to buy a house, selling a house, job loss, etc.). The article refers to the top 10% wealthiest, everything you mentioned is related to income.