"I don't think that English will become a global language. The only reason it is rising in popularity is because of the numerous countries that use English as their main language, and the popularity of those countries around the world."

But, apples + oranges, you see your argument carries the seeds of it's own destruction!
English will become the global language, but not the English of the English, nor the Dutch, nor the Egyptians nor the French, but I believe it is well on its way to becoming the lingua franca of the world, and in doing so will undergo many transformations.