Bitcoin is different things to different people

If you like go straight to Gigi’s 21 Ways to Look at Bitcoin Project

“A purely peer-to-peer version of electronic cash would allow online payments to be sent directly from one party to another without the burdens of going through a financial institution.”

From Satoshi’s white paper

“Bitcoin is a bank in cyberspace, run by incorruptible software, offering a global, affordable, simple, & secure savings account to billions of people that don’t have the option or desire to run their own hedge fund.”

Michael Saylor

“Bitcoin can be best understood as distributed software that allows for transfer of value using a currency protected from unexpected inflation without relying on trusted third parties.”

Saifedean Ammous

“[Bitcoin is] a global, neutral payment network that allows anyone on earth to transact a huge or tiny amount of value with anyone else within minutes, without needing to ask permission from a government, without disclosing one’s personal information, and without the possibility of censorship.”

Alex Gladstein

“Bitcoin is global, open, borderless, freedom money.”

Yakir Ratner

“Money is energy. Bitcoin is the first crypto monetary energy network, capable of collecting all the world’s liquid energy, storing it over time without power loss, and channeling it across space with negligible impedance.”

Michael Saylor