Answer:
Online Shopping
Expaination:
i would build a website like AliExpress, Ebay, Amazon for many reasons, As i can help many people and prevent them leaving their home they can buy it from anywhere around the world and it will come right to them. Building online shop can bring me alot of money too since many poeple would perfer buyng online then physical stores. As i will also help many people around the world sell their product or what they invented. I would be able to help many people