Cryptocurrency is like any other currency that is known to human civilisation. You may be surprised but yes, crypto currency is similar to any other currency.
The difference is the nature of the currency. The Crypto currencies are not physically available to transact as they are designed on digital platform. You can buy and sell any available goods or services in your surrounding using these crypto currencies provided they have started excepting crypto currencies as a medium.
The best part is that it is not controlled by any central authority. These currencies are not regulated and controlled by any federal bank or government. They are not supervised by any authority.