The 19th century wealth didn't endure; thus the successful book, "The Missing Billionaires". What instead we have today, is tech-entrepreneurship. I tried that, and failed. But most of today's truly great fortunes, were built from tech start-ups, or perhaps their cousins in finance. They're not from inheritance, marriages or lottery winnings.
This brings me to a personal frustration with labels, the retirement-advice industry, and financial advice overall. What is "wealthy"? I don't consider some small number of millions of dollars to be wealthy... not even close.
We hear lots about strategies to accumulate a few million dollars. Save, invest, whatever. Then, maybe retire. We hear next to nothing, about how to turn $10M into $100M or $1B. We view the person with $100K, who wants to reach $1M, as aspirational. We view the person who already has $10M, who wants to reach $1B, as a greedy [expletive]. But here's the thing: a reasonably industrious person, who doesn't have a debilitating handicap or enormous burden or some great misfortune in life, can probably turn $100K into $1M, with some combination of hard work and savings. Now go try using those methods to turn $10M into $1B, or even $100M! Won't work!
For obvious reasons, on this Forum, we have a prevailing narrative... when you amass your $10M or whatever, congratulate yourself, and declare that to be "enough". Retire. Hey, I also want to retire... but I'm sorry, folks... I can't help struggling with the concept of "enough". But I also have run out ideas for how to grow further... my "human capital" is waning, and investment-skill is nothing to brag about. There is mismatch between desires and capacities, all while hearing that hey, the very concept of such desires is louche and excessive. Is it? Is that how those 19th century plutocrats saw things?