Greedily hoarding your $10mil while your children struggle to make ends meet before inheriting it all at 65 (because you are probably going to live to your 90's

Greedily hoarding your $10mil while your children struggle to make ends meet before inheriting it all at 65 (because you are probably going to live to your 90's) is not really a very good solution. Family offices, directed by the patriarch / matriarch should be a bigger thing.