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.
Very simple suggestion. I think to become rich instead of working hard one need to work smart. If working hard people can become rich means by now there should be millions of people should be very rich already. So one should have a good idea and should know how to execute it smartly and make more money from that and also must need a some luck as well.