Bitcoin (BTC) is the first and most well-known cryptocurrency. Here's a quick summary of its main characteristics and how it's generally perceived:

Strengths:

Decentralization: Not controlled by any single entity.

Scarcity: Only 21 million BTC will ever exist, which adds to its appeal as a store of value.

Security: Strong network secured by proof-of-work mining.

Liquidity: Highly traded and widely accepted in the crypto space.