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Thats why the quote is right, "rich get richer, the poor get poorer" because they don't have capital to invest, start a business, etc.
you are right that first we need to earn enough money that will give us big returns on investment, or enough money to start a small business which have high chances to grow and future.
some lucky people are able to get high returns or gain financial freedom because there are very less opportunity like bitcoin in early stage, people who invested early were lucky to gain high returns.
This isn't always the case with all poor people, many of them have the capital but because they are not rich they get so attached to the little they have, and telling such people to invest is like telling them to go back been broke again.
They only know hard work but they don't know about smart money, they aren't trained to take risks they are trained to work very hard all the days of their lives, this is why they have the wrong perspective about making money and getting rich.
This is also why the rich don't like helping the poor at times, because they see the poor as the most greedy people over all, they believe they aren't prepare to risk their money but they can go to the rich seeking for help, where as these rich people risked it all.