The point is old money is not showy compared to new money. New money is Lamborghinis, modernist mcmansions and private jets. Old money is low key, they don't want to get clocked as being rich. Maybe they drive an old mercedes or wear ordinary clothes, but their friends know they have a controlling interest in a huge corporation, their own private island, etc. So sure, ordinary people can replicate much of the 'aesthetic', because its about rich people not wanting to seem rich.