Ethereum is an open source blockchain that offers a cryptocurrency called "ether". Aether is a digital currency used to run smart contracts and like Bitcoin; not controlled by any bank, government or any financial institution. Also, the ether is not associated with any currency, which means that your local currency has no impact on its value and can be exchanged in real cash in US dollars or PayPal on the Internet in a completely anonymous manner. Ethereum Digital Currency Exchange To Dollar Euro and Paypal