Spoilers:



The point is that his insurance doesn't cover everything. His family will be left with medical debts on top of what they showed were already credit card debts in progress. He feels that he should be able to provide for his family and if he's dead, he's not doing what he's supposed to be doing as the "provider of the family". He moves from the initial thought of trying to make at least enough money "in general", so his son can go to college and wife and new baby will be taken care of after he dies, to getting greedy and feeling the power of what he can do with his potential.



The point of Breaking Bad is that you're watching exactly what people do to themselves. You, straycat-74, may be able to see and understand that doing such things will result in more bad than good in life, but Walter is like most people in this world who make the wrong choices, for what they feel are the right reasons. He feels dumped on his whole life, and sees this as his chance to become something more than what he was, not realizing that what he was already, was good enough for his family. "It's a Wonderful Life", so to speak.



To me, watching a show like this isn't about glorifying meth production and sales, like some folks have been saying. I find it's quite the opposite; it makes me NEVER want to even think about doing something like that. Ever! A show like Breaking Bad is a show because you see the drama and the situations that characters go through when they do these things in life. They grow, develop, change, go left when they shoulda gone right. And for those who enjoy the show, find themselves on the edge of their seats each week to find out what's going to happen from those choices.