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
As solid plan as any. I'm starting a crowdfunding campaign to finance this, hopefully you won't sue me over stealing your idea.
I think a lot of people who had the idea to create a time machine so that they can become rich from using the equipment? I think the tool it is impossible. destiny will never be changed and you will not be able to make a time machine. because it would change the destiny. if you want to be rich then work hard dude