I can raise 6 billion in 6 months

truth of the matter is, anyone (i.e a graduate) can work in a bank.
In most cases, its a routine work.
raising and signing of vouchers/cheques every blessed day.
Yes, sometimes, you may take a short trip to the clearing house and have sleepless nights trying to balance the books.

But if it is the financial world that you are interested in, then you don't really have to work in a bank. Join a finance consultancy company. It could be a rollercoaster.

Hope this helps.

Yeah bro! It's very possible! But you may have to do a PGD once you've started working in order to hasten your carrier progression! I know of at least two who are currently having a great career in the sector.