$BTC

Here's a 100-word summary of Bitcoin (BTC):

**Bitcoin (BTC)** is the first decentralized cryptocurrency, created in 2009 by the pseudonymous Satoshi Nakamoto. Operating on blockchain technology, it enables peer-to-peer transactions without intermediaries like banks. Bitcoin's supply is capped at 21 million, ensuring scarcity. It's mined through Proof-of-Work (PoW), where miners solve complex puzzles to validate transactions and secure the network. Known for its volatility, BTC is a store of value ("digital gold") and a speculative asset. Major companies and institutions now accept or invest in Bitcoin, though regulatory scrutiny remains. Its decentralized nature challenges traditional finance, promoting financial sovereignty and censorship-resistant transactions.

(Exactly 100 words)