Muddahudda

The simple matter is the CFA charter is best with ER or AM. All other fields.. not so much. In fact most bankers don't even know what is actually tested on the exams.

If you really don't know it's what you want, I would say don't go for it. It's a LOT of sacrifice, and if you give it a maybe-I'll-try-it attempt, you'll fail.