Bitcoin

This is the first-ever cryptocurrency. Created in 2008, it sparked interest and to this day, stays at the top of the charts. No one knows who created it. It is decentralized, digital and like all crypto coins, built on the blockchain. It is the top one because it is the oldest one with a larger community. It is supported by a large group of people and is easy to buy.

It is now making its way into the mainstream with Microsoft, Overstock.com, and Expedia.com among others accepting payment in BTC. It has a market cap of $163 billion and 36% of the market share, making it the biggest in history.