He has so much money they created a foundation to give it away in an orderly fashion. I don't think making more money is his concern at this point in his life. More likely it's the usual things that cause couples to divorce. And frankly, it's really no one's business but theirs.
@BassWrangler Thank you for posting that. It seems news posted here about any prominent person causes people here to call them names, say bad things about the person.
Bill Gates helped this country in great ways; without him, we would not be able to communicate like we do - one of his "inventions" is called a "computer".
Between the two of them, Bill and Melinda, they have billions of dollars - good for them; it is not a crime to have money. I do not get people being mad because they have billions.
Wrangler, you are so right - it is their marriage and no one's business.
"In his 84 years, Thomas Edison acquired a record number of 1,093 patents (singly or jointly) and was the driving force behind such innovations as the phonograph, the incandescent light bulb and one of the earliest motion picture cameras. He also created the world’s first industrial research laboratory."
Now, let's go search for his marriage, find out if he drank whiskey, etc., so we can hit on him for his inventions and the money he likely made.