Insecurities?
lol you still don't get the point.
You can't just ignore sales, sales is a measure of how well a series is doing vs itself.
You are too fixated on comparing the series up there, I'm telling you to compare the series to itself.
That's when sales matter. If a series' sales are plummeting compared to what they used to be, that tells us a lot, you can't ignore these things.
There are a lot of factors that make the sale-Including the people who grew up watching it and now are adult and still read it because it's a continuous story and still light fun gag manga and what not and it has become a part of them. Like one OP reader described it:
It has become a cult by itself.One Piece reminds me of a line from one of my favorite movies: Shaun of the Dead. Shaun: "I like having him around, I've known him since primary school, and besides he's a laugh! Pete: "Ok, I admit on rare occasion he can be funny. Remember when he was up all night drunk playing Tekken 2?" Shaun: "Oh yeah (laughs) ..."