0xww.com is valuable because the '0x' prefix commonly signifies hexadecimal values in programming and technology contexts, which could appeal to tech companies or cryptocurrency-related ventures. The 'ww' could stand for a wide range of meanings from 'world wide' to personal or project initials. Together, '0xww' in a .com, which is the most recognized and trusted domain extension, could signify innovation and global appeal, making it highly desirable for branding in technology sectors.