Specialize in sports equipment
Gyms are all the rage, but people want germ protection, owners want protection for equipment
Success comes easily when you find crowds of people that have a problem or need and no way to solve it or fulfill it.
Never create something thinking "Everyone" is your customer. Never think something is needed, make sure it is needed by asking the people you think need it. The fastest way to go broke it to create something you believe everyone needs buy in reality no one wants.
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