It is only naive entrepreneur will rely on a single business. Most of the super rich people of the world own more than one business.
Dangote has sugar refinery, cement company, flour company and he is still proposing to establish crude oil refinery.
Mark Zuckerberg owns Facebook, WhatsApp and Instagram. Each of them is generating billions of dollars every year.
Elon Musk spaceX, Tesla, Nuralink etc. Another example of multiple streams of income.
Bill Gates has Microsoft. He also has large shares in Berkshire Hathaway, UPS and FedEx.
Larry Page Google and some other subsidiaries under ABC group.
Mike adenuga has Global com, conoil, real estate properties and some other private companies.
The list is endless. These people understand the power of multiple streams of income.
If you rely on one source of income you are doom, anything can happen to the business, as an entrepreneur prepare for the worst and hope for the best.