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
Not sure on how to get rich because if I knew then I would not be here right now and to be honest you also need to have a bit of luck.
If you work hard then luck might come your way and maybe you will get rich.
I believe hard work does not need luck by its side, luck is needed where someone does not have to work at all but luck does everything for him like in gambling, there is not hard work in gambling but if you get lucky you will become rich in minutes, if not then poor in seconds, but if you work hard on something you would most probably achieve that target.