Olivier Dassault was an extremely accomplished pilot, graduate of the French Air Force academy and rated on many aircraft. I don't know for sure, but I would be very surprised if he was not rated on his own helicopter. Someone else I knew always flew his own turbine helicopter with with another pilot, basically two crew operations.
One can only imagine what having the billionaire aircraft owner and pilot’s employer as an actual crew member might do to CRM and/or any decision making process? 😳
Not a situation I’d like to be in.