If you want as much power as a Roman Emperor, this is possible. There are those in the heights of the political systems that shape societies and declare wars. The same goes for those with great prowess in business.
All the magick in the world will not matter, however, if you do not know how the actual world works. If you want to attain political power, then you must learn about politics. If you want to create a business empire, then you must understand how business works. Being a successful entrepreneur requires as much craft as any art or science (including magick), and so you must hone your craft through study and practice.
The difference for you, one who wields magickal power, is that all of these factors for success can be yours much more quickly, and with much less effort, than for any ordinary person. Magick will bring you knowledge, it will bring you the opportunities you need to hone your craft, and it will bring you great fortune. None of this matters if you spend all of your time fantasizing about some nonsensical situation in which all the world bows at your feet while you remain stagnant and unmoving.
Read a few non-magickal books about business, or politics, or whatever it is that you want to do with your life. Gain an understanding of the world, and then use this understanding to make this reality serve you.
I see too many dark magicians claiming to be rebellious, independent beings who shun all masters, who in reality are slaving away at some 9-5 job (or jobs, even), having the fruits of their labor taken from them by their bosses in exchange for a meagre pittance of a wage. Those with courage reject such a situation, and create their own means of financial sustenance. It is those whom I respect more than any other.