Do you know what would happen if I suddenly decided to stop going into work? A business big enough that it could be listed on the NASDAQ goes belly up. Disappears! It ceases to exist without me.
Walter is the main cook for Gus Fring’s billion dollar empire. The purity of his product is at least 99.1%, which is the purest every character in the show has ever seen. That is why he is so valuable to Fring. Gus knows that as much as he doesn’t like Walter, he can’t kill him because the production of his product is too important. That is the only thing that is protecting his life.
The NASDAQ is the second biggest stock exchange in America, and Walt claims that he and Fring’s meth operation is just as valuable as the well known legal operations in America. Walt brings all this up to make Skyler realize that his responsibilities are no longer just drawing atoms on a chalk board for his students. He is one of the most important figures in one of the most powerful meth operations in America and should not be trifled with.
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