Bitcoin

Bitcoin (₿) (ticker BTC)is an open-source cryptocurrency with a limited supply of only 21 million coins ever, considering that 1 BTC = 100,000,000 satoshi known as sats.

It is a decentralized cryptographic currency without a central bank or single administrator in control.

Transactions can be sent from user to user on the peer-to-peer bitcoin network without the need for a third person in between, like a bank, payment processor, or institution.
All transaction processing and verification are carried out collectively by the network.