Still many rich people not aware of the crypto currencies if they knows then they will get interested on investing on it which make the prices to move further but that is not the growth we wanted we want the people to use it because it can give the freedom of using their money on their own maybe the day not yet come but surely the day will come for that let's hold our hands together and make the bitcoin recognized by common man.
I think they don't aware or don't care, but comfort and ego. Crypto can only be seen digital, in contrast to luxury that can be seen as real as gold, fiat, or home. And we might not know whether they have crypto or not.
Historically, the money system has changed over time, from barter to the present, for now crypto still cannot replace fiat position, more precisely crypto we call digital assets