Is there still opportunies on facebook to create applications and grow them into multimillion pound businesses?

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I am 18 years old and I have a few grand in savings. I recently bought a book for dummies called building facebook applications. I have an interest in creating a few facebook applications from scratch and try to grow them into multimillion pound businesses with employees and things. Is this possible to do, and is there still and always going to be apportunities to do so usimg the facebook application platform?