If you asked 30 years ago what Billionaire's need to do to get to where they were, the answer would be lots of fecked up things.
Nowadays, the amount of VC/Seed funding available to startups that can make some average guy with an average product into theoretical billionaires negate a lot of the need to do dirty things.
For example, Jack Dorsey in 2006 was just a software engineer earning a decent bob in California as most Software engineers at the time did.
Him and his mates come up with Twitter, and when the company literally only had 30 employees, he got VC funding which made him worth 800 million USD overnight, on paper.
Dorsey has turned a bit odd since then, but at that point, I'm not sure what "evil" he had to do to get to being a theoretical billionaire.
you make starting twitter sound like a piece of piss