I have a friend who is really creative, and what you would call an idea person. She's considering majoring in advertising, but says that people can burn out really fast in the field. Is advertising not a good long-term career choice?
Probably not, but that doesn't mean that what she does in advertising can't be used to go into some other field later. I know loads of people who do high-pressured jobs for a few years, get burnt out, and then go on to do something else with help from the connections they made in their previous job.
If she has a nack for that sort of thing, then that's what she should do for a few years anyway. She just needs to be aware of and plan for that burn out phase. Maybe do something else for a time and then go back to advertising again. Anything is possible.
If your friend is really creative and enjoys what she does the burnout rate may be different for her. There are lots of books that help you conquer and manage burnout in the job place she could read if such a thing happens.
I think that if it is something she likes to do she probably won't get burnt out. Advertising and marketing is pretty transitional though. You can do marketing for companies in different stores or sales from one company to another.
Many of those who burn out quickly probably make a lot of money in the interim. Going forward, you can use the skills and experience in another career. As an example, someone who has been a copywriter is probably well-suited for creating web content.