Most people aren't willing to do whatever is necessary.
The (whatever) will vary from person to person. It may mean learning how to sell, building a good team, finding the right mentor, creating a product/service that is in demand. sacrificing short term gratification for long-term results, using self-discipline to stay focus on goals by taking steps daily, finding something they are truly passionate about, and having strong reasons for why they (have to) succeed, being persistent and determined to never give up until their dream is realized. It's been said: "Success leaves clues."
You read any bio on just about any highly successful "rags to riches" story and you're likely see it was not "smooth sailing". They'll be some stories about people living in their car, being rejected time and time again like Harlan Sanders who was rejected (1009) times before a restaurant took him up on his chicken recipe. He was over age 65! Today KFC has global recognition.
How many people would have stopped after 50, 100, or 500 rejections?
Walt Disney went bankrupt, the Honda factory was destroyed, John Paul DeJoria went from being homeless to being the founder of Paul Mitchell hair products and Patron Tequila (both are Billion dollar enterprises!)
If you can't (sell) or persuade people it's hard to become rich.
Ambition, hunger, desire , persistence and determination are traits found most often in successful people. They learn from mistakes and find ways to overcome setbacks. They have an ability to believe in themselves even when no one else does and somehow find a way to stay motivated.