0x0077.com is valuable because "0x0077" can be interpreted as a hexadecimal number which equates to the decimal number 119 or the ASCII character 'w'. This makes it appealing for brands or entities related to technology, coding, or digital services. Additionally, combining it with the 'com' TLD, which is universally recognized and trusted, enhances its potential as a premium domain for tech-oriented businesses, possibly relating to software or web development.