old money
noun [ U ] uk/ˈəʊld ˌmʌn.i/ us/ˈoʊld ˌmʌn.i/
(PEOPLE)
祖上殷实的富人，富裕世家
used to refer to rich people whose families have been rich for a long time
Much of big business is still controlled by old money. 大型企业很大程度上仍然由传统富家控制着。
(MONEY)
作废的钱，不再使用的钱
a type of money that is no longer used