$BTC

Here's a concise overview of Bitcoin ($BTC) in exactly 100 words:

**Bitcoin ($BTC)** is the original and largest cryptocurrency by market capitalization. Created in 2009 by the pseudonymous Satoshi Nakamoto, it introduced blockchain technology – a decentralized, public ledger secured by cryptography and a "proof-of-work" consensus mechanism. Bitcoin aims to be a peer-to-peer electronic cash system and a decentralized store of value, often called "digital gold." Its supply is capped at 21 million coins, creating inherent scarcity. While praised for its security, decentralization, and potential as an inflation hedge, Bitcoin faces criticism for its volatility, high energy consumption for mining, and scalability challenges. Major institutions increasingly view it as a legitimate asset class.

**Key attributes:** Decentralized, Limited Supply, Store of Value, Pioneering Blockchain, High Volatility.