What unique idea would you have for a start-up of a business?

[Shortie]

So many business ideas have been done so many times that it can often feel like if you were to start a business that had already been done, you would just end up a small fish in a huge ocean and just get lost in the crowd. Having something unique to make you stand out from the crowd would be a good option whether it be a unique idea within your business or just a whole unique business idea.

What unique idea would you have for a start-up that has never been done before or to your knowledge hasn't been done before?