Is it weird that some people have money but don't want to spend it on themselves?

My aunt has money and doesn't have to worry about working ever again in her life. She's been in Vietnam for 4 months, donating thousands of dollars to help build houses for people. She could easily travel the world or spend it on luxury clothes. Instead, she's been essentially giving money away.

Is it weird that some people have money but don't want to spend it on themselves?
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