Phantom Wallet is a non-custodial, self-hosted Web3 browser extension and mobile application that supports multiple blockchain networks. It allows users to manage their digital assets, including cryptocurrencies and NFTs, securely. Phantom Wallet emphasizes user sovereignty and security, enabling users to store their private keys and have complete control over their assets. The legality of Phantom Wallet depends on the specific laws and regulations of each country or region. Users should ensure that they comply with local laws and regulations when using Phantom Wallet or any other crypto wallet.