Trump built a business and a company exactly like a whole bunch of other ones. Heck, he didn't even really build it; he mostly inherited it. Like most rich, white, unethical, racist millionaire dudes, Trump's dad was a rich, white, unethical, racist millionaire dude who helped his son become a rich, white, unethical, racist millionaire/billionaire dude through that famously "modest" loan of somewhere between a million and fourteen million dollars.
Trump ran for president less as a real estate developer and reality show host than as a billionaire. His whole spiel was essentially, "I'm rich as fuck and if you elect me president, I'll use my magical wealth-generating powers to make our country rich and great" (which in Trump's mind are the same thing). His entire campaign was built on the idea that he was a money-shitting Gandalf.
New Line Cinema
Trump was devastated when he found out that "You shall not pass" was originated by a British person.
So it's understandable why pop culture writers have a tendency to see all fictional billionaires through the prism of Trump. Hell, in a three-week period I watched Rat Race, Batman Returns and even the little-loved Kevin Spacey-as-sassy-cat flop Nine Lives and was struck by how much the billionaire characters reminded me of Trump. I should not have been. The billionaire characters in those films do what billionaires in movies and in life always do. They meddle in politics, participate in flashy publicity stunts, callously manipulate the public to their own financial advantage and generally do the kind of nasty, amoral stuff that allows billionaires to stay billionaires rather than being reduced to the sad state of mere millionaires.
Donald Trump did not originate the concept of being a gross, greedy, narcissistic billionaire. Let's stop acting like he did.