1. The first cryptocurrency
That’s the backbone of the whole crypto market. It’s also the pioneer of the block-chain integration. It’s been over a decade since January 2009 - the first release of BTC.
The coin has a clear vision, purpose and principles.
All other coins rely on BTC methodologies, even the cryptographic models (known as hash). You can understand any other crypto if you’re familiar with Bitcoin. The opposite may be not the same.
The coin has a history, a lot of challenges, interesting facts, changes and improvements, business integrations, different options for beginners and experts, and even more.