Satoshi (Unit)
Bitcoin's smallest unit — one hundred-millionth of a coin — named for its creator.
A satoshi (sat) is 0.00000001 BTC — one hundred-millionth. With Bitcoin around $64,000, one dollar buys roughly 1,560 sats. The unit matters practically: micro-payments (Lightning invoices are denominated in sats) and psychology — “stacking sats” reframes Bitcoin as accumulable by anyone, no whole coin required.
Fee rates are also quoted in sats (sat/vB) when bidding for block space. Whether mainstream pricing ever flips to sats — a periodic community campaign — the denomination already does real work: it’s the reason “Bitcoin is too expensive for me” is a display-format misunderstanding, not an economic fact.