Hi zememe. I suppose it’s technically possible to do what you want however that folder is referenced in numerous files. They would all have to be changed. You could speed up the process with a “text replace” utility like wingrep I guess but as soon as you update WordPress all the changes will be lost. Another possible option would be a little redirection magic in the root .htaccess file.
I’m curious though, why do you want to change the folder name? Security? As long as you have a good strong password and proper permissions you have nothing to worry about.