Most entrepreneurs stop at one business, which if luck has it, they run it for their entire lifetime.
If luck comes tumbling down, they start a variation of their first business thinking they are smart to do so. The market gets saturated by this time around and their growth is capped.
It takes real hard work to start a completely different second business and a third one and a fourth one and so on.
The key to staying sane when doing so is to get motivated by money while staying grounded to a higher purpose that chains you to the ground and makes you feel like the sky is too far above to jump and reach.
You need to buy, manufacture or assemble a plane to have a chance at soaring in the sky.