Digital Property, Wallets, and Seed Phrases

Bitcoin is recorded on a public ledger (the blockchain). Your phone does not store coins inside it. What matters is ownership and control. When you hold Bitcoin in a non-custodial wallet, you control the ability to move it. That control comes from private keys (secret information that authorizes spending) and a seed phrase (usually 12 or 24 words that can recreate the wallet and its keys). Private keys are the specific secrets your wallet uses to sign and spend; the seed phrase is the master backup that can recreate all of those private keys on a new device if you lose your phone. The core idea: if you control the keys, you control the Bitcoin. If you lose the keys, you can lose the Bitcoin. If you give the keys to someone else, they can take the Bitcoin. Bitcoin should be treated like valuable digital property: transactions are designed to be irreversible once confirmed, there is no customer service to undo a confirmed payment, and careful habits prevent permanent loss.