I dont suppose there is one definitive answer to this.
But my interpretation to this is where you started to where you end up - for example, some of you may know of Alan Sugar (he is the UK version of The Apprentice). He came from nothing, a rough council estate in London and built himself up into a multi million pound business (albeit not making very good goods, imho) but to me, that is success.
I know there are many people who say if you are born with a silver spoon in your mouth and become rich then that is not success, I tend to diagree because it still requires a certain amount of work but I think coming from less and achieving more is just a greater level of success.
In terms of banking, I think part success is just even breaking into banking (again can vary depending on your background) - that is what I am striving for at the moment.
And of course, the size of ones wallet will also determine your success!