Vitalik.tech is valuable because the name 'Vitalik' is notably associated with Vitalik Buterin, co-founder of the Ethereum blockchain platform, rendering it highly recognizable in the tech and cryptocurrency industries. The .tech extension specifically targets technology-related fields, enhancing the domain’s relevance and appeal to tech startups, blockchain technology companies, or personal branding websites devoted to tech discussions or Vitalik Buterin's contributions to the tech world.