eth.0x.city is valuable because it combines "eth", suggesting Ethereum, a key player in blockchain and cryptocurrency, with "0x", a reference to hexadecimal addressing common in programming and Ethereum transaction formats. The '.city' TLD adds a communal or metropolitan aspect, appealing to urban tech communities. This makes the domain particularly appealing for tech-focused platforms, Ethereum-based projects, or community initiatives within the tech-savvy, urban population interested in blockchain technology.