What tattoo do you want and where would you put it?
I guess some people put their tattoo on the outside to represent something. So that they are on the same page, with different types of tattoos some may have the same tattoos with the same logos which probably means their personalities are on the same page.
There is a decentralisation element to it too.
Community based future
With each community that has a decentralisation element to it with types of topics.
