I think it might be because I'm autistic but can you help me understand why it's in bad taste to ask it? I see YouTube videos of people talking about how they became really wealthy or showing off their houses or cars, and this person was talking about his bank account directly and has mentioned the 3 comma thing before, so I'm a bit confused why it's not ok to ask more about it.
You did mention something I didn't think of which is lifetimes, I guess if someone wanted to guarantee an ultra wealthy lifestyle for all generations of their kids and grandkids forever, that would be a reason to hoard wealth into the hundreds of millions.