The accumulation of interest. Families with generational wealth typically have the money for such a long period of time that the investments and assets have had years to grow and they never really tap into the initial wealth itself. (did that make any sense?? lol) A newly self made person is tapping into the wealth…not interest earned….
I’m sure there are other reasons such as paid for assets passed down and tax breaks…
Old wealth is NOT more stable then new wealth. 90% of US millionaires are FIRST generation. That means their parents WERE NOT millionaires. Self-made millionaires became millionaires by PROVING they could live on less than they earn. Those who inherit wealth, tend to spend more than the earn and LOSE the money.