How would you take advantage of the past?

In a lot of the manhua I read, the MC (Main Character) gets sent back in time 10-20 years in the past to right their wrongs in whatever way the author deems fit. Recently there have been a lot of MC's who take advantage of their knowledge of the future of different stocks to gain unimaginable wealth.

With that idea in mind, going back 10 years, what path would you take to become known to the world as the God of Investment? Using your current knowledge to your advantage.