Yes you've heard me right. The best selling comic book series is not enough. According to Wikipedia and all the research that I could do, One Piece is the second best selling book series of all time, only behind Harry Potter.
One Piece has sold over 320 million copies while Harry Potter has sold 450 million copies.
However if One Piece keeps it sales, by the time it ends it will surpass even Harry Potter at this point. Oda has planned about 1 200 chapters and about 10 more years of One Piece. If you look at the sales it's rather probable that it will topple Harry Potter.
But is that enough? Oh heck no! It isn't just that!
Even movies or videogames have sold less than that, so technically if One Piece does topple Harry Potter, it will become the most succesful fictional work of all time!!!
And in my opinion at least it deserves so.
So when you say One Piece is the best thing ever... you're not that far off from the truth!
One Piece has completely changed my life. It made a horrible childhood into an amazing one and it raised me with it's ideals. I was a lost child that didn't know what was right and what was wrong and One Piece taught me what was. I wouldn't be here if it wasn't for it. I spend several hours dedicated to One Piece everyday, soon I will begin my 10th runthrough of the series, I'm trying to learn japanese for it and I can't say how much fun it always is for me. For all of this, thank you Oda.