Bitcoin: Bitcoin is an easy pick. It was the first major usable cryptocurrency; it has the highest market cap; its coins trade at the highest cost of all cryptocurrencies (about USD 225 as of June 2015, but as high as $5,000 during early September 2017). Despite the big increase in price, Bitcoin seems to be the best choice for anyone entering the cryptocurrency space. It is the most familiar and invested-in coin. Primarily Bitcoin is the reason anyone is talking about cryptocurrency in the first place. You might not want to start a CPU-based Bitcoin mining company in 2017 or start buying coins for $5,000 each (which is fine since you can buy fractions of a coin) but it’s still going to take 1st place on our list.
1) Controlled supply: Most cryptocurrencies limit the supply of the tokens. In Bitcoin, the supply decreases in time and will reach its final number sometime around the year 2140. All cryptocurrencies control the supply of the token by a schedule written in the code. This means the monetary supply of a cryptocurrency in every given moment in the future can roughly be calculated today. There is no surprise.
In 2009 Satoshi Nakamoto had found a way to build a decentralized coin and cash system without a central unit. From this Bitcoin was introduced to the world as the first digital currency of its kind. The “blockchain” is the master ledger that records and stores all the transactions and mining activity, trades, and purchases. At the same time, it requires validation of ownership. Technically a transaction is not finalized until it is added to the blockchain which usually takes a few minutes and is irreversible. During the time between transactions, the units are not available for usage by either side, which prevents double spending, fraud, and duplication. Each user has a “wallet” with specific information that confirms them as the owners of any specific cryptocurrency. Each user’s wallet allows them to send and receive coins and acts as a personal ledger of transactions. These wallets are built to be secure however additional measures and passwords need to be considered to keep them secure. The wallets can be stored on a cloud or an internal hard drive. The “Miners” act as the “record keepers” for the cryptocurrency communities. Through technical methods they create new coins and verify the blockchains.
A cryptocurrency (or crypto currency) is a digital asset designed to work as a medium of exchange that uses strong cryptography to secure financial transactions, control the creation of additional units, and verify the transfer of assets.[1][2][3] Cryptocurrencies use decentralized control as opposed to centralized digital currency and central banking systems.[4]