The black and white nap cartoon style usually emphasizes the play of light and shadow. It can give a retro or artistic feel, and might be used to evoke a certain mood or create a sense of mystery.
The image of a cartoon man in an armchair might symbolize comfort and a sense of security. It could also imply that he's in a thinking mode or just enjoying some downtime. Different interpretations can depend on the context and style of the cartoon.
Not much. Decentralization is more about governance and power distribution, while caricatures are usually for entertainment or social commentary. They don't have a direct link.