[Fargren]

I'm not a native speaker, but the first entry in the dictionary for worry is "to torment oneself with or suffer from disturbing thoughts; fret", while "care" when used as a verb is defined as "to be concerned or solicitous; have thought or regard"

I have thoughts and regards about my financial situation, and will for the rest of my life. I think everyone has such concerns, so saying that someone cares about their financial situation is kind of meaningless. If that's your definition of worrying, even the richest person in the planet worries about their finances.

I certainly don't torment myself thinking about my financial situation, nor do I think I will ever need to again.

EDIT: Actually, there are people who don't care. I've seen them. But these people generally have never learnt to care: they are either children, who havne't had to handle money yet, or people spoiled people who essentially behave as children. In my experience, not caring about money is not related to how much money you have.