Buy or develop your own time machine and go back to 2008 and mine BTC on the computer at your mothers house in the basement

Work hard and save up for the future, and also invest something.

yeah. working hard is also my way of getting rich. work hard and invest the money you have earned through the years to gain decent interest.

just working hard will not make you rich,you need to be good at money management and not being consumtive people

work hard, be good at managing money and consumtive people will not always make you rich. which is surely going to make you happy.