To get rich you need to invest in business that you have a background with,know all the necessary things needed before you start one.
As time pass by your business will grow then if you are making the right decision you will become rich.
Investing into the bitcoin can be good and can you make rich, investing in company's can even be better but this is really depending on what kind of company in my eyes.
To get rich from bitcoin you need to invest a huge capital, and the profits are not guaranteed as no one knows what will be the price of bitcoin in future, good to invest in different products to reduce the risks.