Start with something small. Open up a coffee store or maybe a roadside stand. Make your product so good people will depend on it.
Then, raise the prices. Open up branches. Make sure you have a monopoly on the product.
Then, buy up other companies with your fortune.
Next, use your money and power to corrupt a small government. Make that nation your own, and conquer other nations. Amass an army to conquer the superpowers of the world, and use their resources to sweep up the rest.

You have now conquered the world. Now, think of a really immature name to call your nation (just for the lulz). I suggest "The 69 republics" or the "People's Emancipated Nation in Sovereignity".

Sit back, relax, and feast on hershey's kisses or something