Bitcoin is the first and most successful cryptocurrency to achieve mainstream awareness. First introduced on 31st October 2008 through a scientific paper written by the mysterious Satoshi Nakamoto, it is now the largest decentralized currency in the world, with a market capitalization of over $200bln.
The simplest way to describe Bitcoin is that it is a store-of-value just like gold - except digital. Its methodology of tracking each and every Bitcoin in existence without the need for a trusted entity makes it highly desirable as a limited and unique asset for use in trade, finance, and technology.
Satoshi intended Bitcoin to be an independent, digital currency alternative to sovereign fiat currencies, which are controlled by central banks and governments. In the modern context, Bitcoin is a highly desirable asset that has steadily reflected increased value over the past ten years of its existence.