Bitcoin Basics · Episode 2 · 90 seconds, narrated

The problem bitcoin solves

A short cartoon about why digital money could be copied, how banks stop the same money being spent twice, and the different fix bitcoin proposed in 2008. Turn your sound on and press play, or jump to a chapter.

0:00 / 1:30

Numbers in this episode

≈ 9 in 10: Most US dollars are bank balances, not cash: cash was about 10% of the $23.34 trillion M2 money supply in August 2026 (Federal Reserve H.6).
2008: On October 31, 2008, Satoshi Nakamoto posted the paper “Bitcoin: A Peer-to-Peer Electronic Cash System” to a cryptography mailing list. The creator’s identity is still unknown.
1st spend: The paper’s rule: payments are announced to everyone, and when two spend the same coin, the earliest one counts.
~10 min: New blocks of payments are added about every 10 minutes on average, so a payment takes minutes to settle; many services wait for several blocks.
25,800: Publicly reachable computers (nodes) keeping and checking bitcoin’s record on October 10, 2026, according to btcnodes.io; many more run without being reachable.

Script

Read the narration

For education only; not investment advice. The coin serial number, the shops and the bank record are illustrations. Banks and payment apps also offer protections this episode does not cover, such as fraud refunds. Narration uses a synthetic voice (Kokoro text-to-speech). Part of Bitcoin Basics from The Steady Block: @TheSteadyBlock on YouTube and X, TheSteadyBlock.com.