The last Bitcoin is expected to be mined around 2140. Bitcoin (BTC) is a digital currency with a total supply of 21 million coins.
The smallest denomination of Bitcoin is called a Satoshi (Sat). It is similar to a penny in USD, with 1 Satoshi equaling 1/100,000,000 BTC. At the current Bitcoin price, 1 Sat is worth approximately $0.00104530 USD.