Since I saw no ''Finances'' section on this board, this thread becomes part of the ''Off-topic''-s.
The importance of corporate sharks in the above-mentioned fields (and in general) is huge. You can hail from a family of millionaires (or billionaires even) and still go totally bankrupt if you have no business sense. Several more Hiltons like Paris and boom - money's gone. Of course, there are people like Mr. Trump who gave new power to his father's company and successfully explored new fields:
''Born and raised in Queens, New York City, Trump attended Fordham University for two years and received a bachelor's degree in economics from the Wharton School of the University of Pennsylvania. He became the president of his father Fred Trump's real estate business in 1971, and renamed it to The Trump Organization. Trump expanded the company's operations to building and renovating skyscrapers, hotels, casinos, and golf courses. He later started various side ventures, mostly by licensing his name. Trump and his businesses have been involved in more than 4,000 state and federal legal actions, including six bankruptcies. He owned the Miss Universe brand of beauty pageants from 1996 to 2015 and produced and hosted the reality television series The Apprentice from 2004 to 2015.''
https://en.wikipedia.org/wiki/Donald_Trump
Notice how, despite comming from a wealthy family, he did not only sit on his ass but got proper education as well. And got back on his feet several times.
You also have people like Paul Heyman (current manager of Roman Reigns and former one of Brock Lesnar). Guy doesn't have Trump's background (you can read about his family here https://en.wikipedia.org/wiki/Paul_Heyman ) and yet made Lesnar a very recognizable ''brand''. For sure, the latter's wrestling abilities are VERY important but Heyman has arranged some really great opportunities for the guy's career. He's currently doing the same with Reigns. One advantage Reigns had when compared to RAW champion Drew McIntyre is his manager. McIntyre had to go through an exhausting ''Elimination Chamber'' match this weekend (with 5 other competitors) to eventually become a prey to (much less talented, in my opinion) wrestler like Miz (who was Mr. Money In The Bank) after its end losing the title. On the other hand, Reigns had several men fighting in the cell and after that he easily defeated winner Daniel Bryan in 92 seconds. Why? Because a lawyer like Heyman pointed out that Reigns's contract only says ''he has to fight at the tournament''. Nowhere was it said he has to be in the cell with all of the other performers, so he just fought the exhausted winner. I also notice that Roman's talking game is much better nowadays (as compared to before Heyman becoming his manager) and this could help him in the world of cinema as well (have so far seen him in a film the main cast of which were Dwayne 'The Rock' Johnson and Jason Statham). Heyman has also managed Big Show, Rob Van Dam, Kurt Angle and CM Punk - all former champions. It's true that people like The Rock have always had the talking game naturally but maybe with an advisor like Heyman there would be no idiotic films like ''Tooth Fairy''.
As a fan of both Arnold Schwarzenegger and Maria Sharapova, I've read both of them's biographies and the Terminator is a very good example of somebody who not only developed his physique but also his mind, as his ambition was. I also remember an excerpt of Sharapova's story where she quotes her father:
''The cases I say no to some deal allow me to say yes when I really want to.'' - Yuri Sharapov says. That's extremely important in the world of business and applies to life in general. My personal experience absolutely confirms it.