No, One Piece anime is not over. One Piece is an ongoing anime and manga series that has been serialized in Japan since 1997. The anime adaptation of the series, which is produced by Toei Animation, has been airing continuously since 1999, and as of 2021, it has over 900 episodes.
The story of One Piece follows Monkey D. Luffy, a young pirate with the ability to stretch his body like rubber, as he sets out on a journey to find the legendary treasure known as One Piece and become the next Pirate King. Along the way, he gathers a diverse crew of fellow pirates and battles against various foes as he navigates the dangerous seas of the Grand Line.
One Piece is one of the most popular and longest-running manga and anime series of all time, and it has a dedicated fanbase around the world. While it is not clear when the series will ultimately come to an end, it is still ongoing and new episodes and chapters are regularly released.