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
Be an entrepreneur. This is the only way.
To be an entrepreneur you need a lot of money first. To make your business a success you are going to need effort as well, and a lot of good luck as well. In some countries being an entrepreneur is simply mission impossible unless you are already relatively wealthy enough to face an unfortunate result with your venture.