well i think they are, there is a rumor that Zuckerberg is investing in bitcoin. And hell yeah they know that it exist.
All billionaire an millionaire are all business minded.. They always keep on research what kind of business they have to build. So for me with regard the question above. I say...
Absolutely yes... Many billionaire an millionaire who are invest thier money in bitcoin...especially they already know that the stock market in bitcoin now is highly volatile...they already know the good future of the bitcoin is in the right track.so they think that the bitcoin is the big help for thier business especially they gain more profit..