LiquidBounce Forum

As a digital currency, Bitcoin lacks a physical form, manifesting instead as data on the blockchain. Its transactions are cryptographically verified and stored in a public ledger. Physical embodiments, such as paper wallets and Casascius coins, provide tangible symbols of Bitcoin. These forms help users interact with the currency physically but don't alter its core nature as a decentralized, cryptographically secure form of digital money.
https://btccryptoknowledge.blogspot.com/2024/06/what-does-bitcoin-look-like.html