Welcome on board, kiddie

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As one who started the process at even older age than you’re now, I think I can say a few words about the topic, now that I have the three-letter word after my name.
Professionally, you should not expect a step change in your career, though the knowledge would be useful. In your case being a Financial advisor, you can be a better advisor for HNW (High networth) indiv or institutions (this is what level III is all about) to manage their portfolios. I would think that as long as you choose to stay within the field of finance, you will benefit one way or other.
Not sure why you think a trader needs CFA (or any academic qualifications at all

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Personally, you will benefit a lot. You will get a lot of opportunities to exercise your aging brain. Expect to have to study at least 3 times longer than what it used to take you when you were 30 years old. It is amazing to see how much your braincells have atrophied.
It will push you to be more effective, to learn more about yourself and what you want.
In addition, the knowledge you gain will definitely benefit you to manage your finance.
It would be additional hardship and suffering because of your age and personal obligations that come with that age, as if it is not hard enough to study the CFA program at any age. In addition, your age group is the 1% age group of candidates: accept to walk into the exam room full of kids young enough to be your own staring at you.
Take it as a personal challenge to yourself, if you have the time or attitude, but don’t expect too much, although the benefits you reap can be in other ways than you imagine.