The convergence of telecommunications and blockchain have paved the way for a new generation of networks, called "Decentralized Wireless" (DeWi). These networks leverage blockchain technology and cryptoeconomics to deliver wireless coverage and connectivity through decentralized peer-to-peer networks, built and operated by individuals. In this paper, we present an overview of the DeWi sector, including its background, operation, enablers, and ecosystem participants. We also delve further into cellular DeWi, outlining the potential business opportunities and upcoming research and industry insights for this category of DeWi.