Bitcoin was the first cryptocoin currency ever invented. No one knows exactly who created it – cryptocurrencies are designed for maximum anonymity – but bitcoins first appeared in 2009 from a developer supposedly named Satoshi Nakamoto. He has since disappeared and left behind a Bitcoin fortune.
Because Bitcoin was the first cryptocurrency to exist, all digital currencies created since then are called Altcoins, or alternative coins. Litecoin, Peercoin, Feathercoin, Ethereum and hundreds of other coins are all Altcoins because they are not Bitcoin.
One of the advantages of Bitcoin is that it can be stored offline on a person's local hardware. That process is called cold storage and it protects the currency from being taken by others. When the currency is stored on the internet somewhere (hot storage), there is high risk of it being stolen.
On the flip side, if a person loses access to the hardware that contains the bitcoins, the currency is simply gone forever. It's estimated that as much as $30 billion in bitcoins have been lost or misplaced by miners and investors. Nonetheless, Bitcoins remain incredibly popular as the most famous cryptocurrency over time.
