Some people are so poor, all they have is money. To Love or to be loved is to truly understand the real currency of wealth. To be loved by the one you love is to transcend the need for currency or wealth.
The hearth and the Salamander can also mean happiness and if Montag chose to be happy or not. The two things in his life his home and his work. Did it really make him happy. He chose happiness over this home and his work by reading the books.