Part 2/9:
All Bitcoin ownership relies on a pair of cryptographic keys: a public key and a private key. The private key grants access to your Bitcoin, allowing you to spend or transfer it. In traditional setups, this private key is a long, complex string of characters, akin to a grain of sand in the universe—impossibly to remember or store securely over time.
Historically, users wrote these keys on paper, stored them in safes, or kept them hidden. However, paper is vulnerable—susceptible to fire, water damage, fading, or physical destruction—potentially leading to irreversible loss if the seed or key information is destroyed.