Bitcoin is a digital asset and a payment system invented by Satoshi Nakamoto. Transactions are verified by network nodes through cryptography and recorded in a public dispersed ledger called a blockchain.
Bitcoin is unique in that there are a finite number of them: 21 million.
Bitcoins are created as a reward for a process known as mining. They can be exchanged for other currencies, products, and services.
As of February 2015, over 100,000 merchants and vendors accepted bitcoin as payment.
The limited supply of Bitcoin is one of the key characteristics that make it appealing as an investment asset. The fact that there will only ever be 21 million bitcoins in existence means that the price of bitcoin could potentially increase over time as demand for the digital currency grows.
One of the key benefits of investing in Bitcoin is that it is not subject to inflationary pressures like fiat currencies. This is because the supply of Bitcoin is limited and not subject to increase at the whim of central banks or other financial authorities.
The limited supply also makes Bitcoin attractive to investors who are looking for an asset that has the potential to appreciate in value over time. While there is no guarantee that the price of Bitcoin will go up, the limited supply means that there is potential for strong price growth as demand increases.