If you’ve come across both “Bitcoin” and “bitcoin” online, it’s not a typo or mere confusion. Let’s clarify the distinction.
Bitcoin (with a capital B) is the entire digital blockchain system introduced in 2009 by Satoshi Nakamoto. It’s decentralized and open-source, with no governing body controlling it. This network comprises interconnected computers that maintain and secure the system collectively. Thus, “Bitcoin” represents the protocol, the payment network, and the brand itself.
bitcoin (with a lowercase b) is the cryptocurrency within the Bitcoin system. It’s the digital currency unit that can be traded and is abbreviated as BTC. For example, BTC/USD denotes trading bitcoin for US dollars.
In summary, “Bitcoin” refers to the overall network and system, while “bitcoin” is the currency used within that system.