If you were extremely wealthy (hundreds of millions or over a billion), you wouldn’t be famous; you would just be a very wealthy person (lottery, business, investing, high-income job, whatever). Would your extended family know you are wealthy, or would you be very vague around them and not flash your wealth?
Yes, but only because I wouldn’t be extremely wealthy for long. Hand me a hundred million? I’ll keep three million and give the rest away. I’ll keep enough to have a middle class lifestyle without needing to work. But I have no need beyond that. The rest is more trouble than it’s worth. I’ll give the rest away; mostly to charity, a good chunk to family. I’ll be upfront and honest with them, telling them that I’m giving away 95%+ of what I received. If a family member later coms begging for money, I’ll point out that I already paid off their mortgage and student loans, and that I only kept enough to enjoy a normal retirement myself.