If he is already rich enough, he may not need bitcoin, although I find your argument too simplistic and I would like to know your friend's level of 'rich'. Do you know approximately how much wealth he has?
Anyway, it is a bad idea to try to change people's minds on financial matters.
I so disagree with the op . I have a friend he is a retired banker. He is wealthy and he is 77.
He has well over 20 million usd. We mine in his office just for fun.
So if a 77 year old worth over 20 million usd is willing to mine and we are still trying a good property to turn into a mine the answer is wealthy people do have an interest.
i see that the rich people are the ones who often find more ways to become richer since they’ve already grown accustomed to a certain lifestyle it’s now important to go beyond that
maybe they’re just not interested because they do not understand the fundamentals of bitcoin or how it works and what purposes does it serve it’s not only a form of investment but also a form of peer-to-peer transaction they’re rich enough to not put in the effort of learning about bitcoin