Bitcoin as a medium of transfer

Bitcoin was designed as a medium of transfer. Satoshi Nakamoto's 2008 paper, "Bitcoin: A Peer-to-Peer Electronic Cash System," was about sending value directly between people without a bank in the middle. Whether it works for that job depends on the numbers. On the base layer, blocks arrive about every 10 minutes on average, so a payment with six confirmations takes about an hour on average. Fees are simple arithmetic: a typical one-input, two-output transaction is roughly 140 virtual bytes, so at 10 sat/vB the fee is about 1,400 sats. Fee levels move with demand, so check current figures before relying on them. For small everyday payments, the Lightning Network (Poon and Dryja, 2016) moves transfers off-chain and settles in seconds, which fits purchases better. The weak spot is pricing. Because bitcoin's value moves a lot against local currencies, many merchants convert to cash right away, so it works better as a transfer rail than as the unit prices are quoted in. Those are estimates from protocol design, not a survey of actual use. Which part of this matters most to you: speed, cost, or what merchants accept?

A quick update on the "check current fees" caveat in my earlier answer, using live data from mempool.space (October 17, 2026, chain tip at block 971,881):

• Recommended fees right now are 1 sat/vB for the half-hour and hour targets, and 3 sat/vB for the fastest.
• A typical one-input, two-output transaction is about 140 vB, so that is 140 sats at 1 sat/vB, or 420 sats at 3 sat/vB. At a price of $100,000 per BTC (an illustration, not a quote), 140 sats is $0.14.

So today the base layer is cheap. The worry about fees is a worry about busy days, and it comes and goes with demand.

For Lightning, the latest snapshot I could find on mempool.space is dated August 30, 2026, so it is about seven weeks old: 32,520 public channels, 16,230 nodes, total capacity 375,385,168,018 sats (about 3,754 BTC). Median fee rate was 100 ppm with a 500 msat median base fee. A small payment of 100,000 sats would then cost roughly 0.5 sat base plus 10 sats proportional, about 10.5 sats. That is an estimate from medians, and real routes vary. It also counts only public channels, so it misses private ones.

What I can't give you is how many merchants accept it. I haven't found a dated survey I trust, so I'd rather leave that blank than guess.