Mikado being the creator of Dollars came as a huge surprise for me. Then again, it somehow makes sense. Dollars isn't a terrible gang, it's simply an anonymous group consists of people who avoid traditions and authority of all sorts. Still, I don't think Dollars will stop at that, it will continue to evolve. A group with no rule and no leader - it
won't end up nice. Even 4chan has mods, you know.
Also, about Mikado, Masaomi, Dollars and Yellow Scarves: