If These Founders Lost Everything, These Are The Businesses They'd Build First

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One way to discover promising business opportunities is by learning what industries business founders would enter if they lost everything and had to rebuild everything from scratch. A scenario on Reddit made business owners think of what they would do if they lost everything except their knowledge. 

"Imagine you woke up with no business, no contacts, and just $500 in your account," the original poster said. "You still have your knowledge, but no network. Which business model would you pick right now and why?"